/**
 * The `fs` module enables interacting with the file system in a
 * way modeled on standard POSIX functions.
 *
 * To use the promise-based APIs:
 *
 * ```js
 * import * as fs from 'fs/promises';
 * ```
 *
 * To use the callback and sync APIs:
 *
 * ```js
 * import * as fs from 'fs';
 * ```
 *
 * All file system operations have synchronous, callback, and promise-based
 * forms, and are accessible using both CommonJS syntax and ES6 Modules (ESM).
 * @see [source](https://github.com/nodejs/node/blob/v18.0.0/lib/fs.js)
 */
declare module 'fs' {
    import * as stream from 'node:stream';
    import { Abortable, EventEmitter } from 'node:events';
    import { URL } from 'node:url';
    import * as promises from 'node:fs/promises';
    export { promises };
    /**
     * Valid types for path values in "fs".
     */
    export type PathLike = string | Buffer | URL;
    export type PathOrFileDescriptor = PathLike | number;
    export type TimeLike = string | number | Date;
    export type NoParamCallback = (err: NodeJS.ErrnoException | null) => void;
    export type BufferEncodingOption =
        | 'buffer'
        | {
              encoding: 'buffer';
          };
    export interface ObjectEncodingOptions {
        encoding?: BufferEncoding | null | undefined;
    }
    export type EncodingOption = ObjectEncodingOptions | BufferEncoding | undefined | null;
    export type OpenMode = number | string;
    export type Mode = number | string;
    export interface StatsBase<T> {
        isFile(): boolean;
        isDirectory(): boolean;
        isBlockDevice(): boolean;
        isCharacterDevice(): boolean;
        isSymbolicLink(): boolean;
        isFIFO(): boolean;
        isSocket(): boolean;
        dev: T;
        ino: T;
        mode: T;
        nlink: T;
        uid: T;
        gid: T;
        rdev: T;
        size: T;
        blksize: T;
        blocks: T;
        atimeMs: T;
        mtimeMs: T;
        ctimeMs: T;
        birthtimeMs: T;
        atime: Date;
        mtime: Date;
        ctime: Date;
        birthtime: Date;
    }
    export interface Stats extends StatsBase<number> {}
    /**
     * A `fs.Stats` object provides information about a file.
     *
     * Objects returned from {@link stat}, {@link lstat} and {@link fstat} and
     * their synchronous counterparts are of this type.
     * If `bigint` in the `options` passed to those methods is true, the numeric values
     * will be `bigint` instead of `number`, and the object will contain additional
     * nanosecond-precision properties suffixed with `Ns`.
     *
     * ```console
     * Stats {
     *   dev: 2114,
     *   ino: 48064969,
     *   mode: 33188,
     *   nlink: 1,
     *   uid: 85,
     *   gid: 100,
     *   rdev: 0,
     *   size: 527,
     *   blksize: 4096,
     *   blocks: 8,
     *   atimeMs: 1318289051000.1,
     *   mtimeMs: 1318289051000.1,
     *   ctimeMs: 1318289051000.1,
     *   birthtimeMs: 1318289051000.1,
     *   atime: Mon, 10 Oct 2011 23:24:11 GMT,
     *   mtime: Mon, 10 Oct 2011 23:24:11 GMT,
     *   ctime: Mon, 10 Oct 2011 23:24:11 GMT,
     *   birthtime: Mon, 10 Oct 2011 23:24:11 GMT }
     * ```
     *
     * `bigint` version:
     *
     * ```console
     * BigIntStats {
     *   dev: 2114n,
     *   ino: 48064969n,
     *   mode: 33188n,
     *   nlink: 1n,
     *   uid: 85n,
     *   gid: 100n,
     *   rdev: 0n,
     *   size: 527n,
     *   blksize: 4096n,
     *   blocks: 8n,
     *   atimeMs: 1318289051000n,
     *   mtimeMs: 1318289051000n,
     *   ctimeMs: 1318289051000n,
     *   birthtimeMs: 1318289051000n,
     *   atimeNs: 1318289051000000000n,
     *   mtimeNs: 1318289051000000000n,
     *   ctimeNs: 1318289051000000000n,
     *   birthtimeNs: 1318289051000000000n,
     *   atime: Mon, 10 Oct 2011 23:24:11 GMT,
     *   mtime: Mon, 10 Oct 2011 23:24:11 GMT,
     *   ctime: Mon, 10 Oct 2011 23:24:11 GMT,
     *   birthtime: Mon, 10 Oct 2011 23:24:11 GMT }
     * ```
     * @since v0.1.21
     */
    export class Stats {}

    export interface StatsFsBase<T> {
        /** Type of file system. */
        type: T;
        /**  Optimal transfer block size. */
        bsize: T;
        /**  Total data blocks in file system. */
        blocks: T;
        /** Free blocks in file system. */
        bfree: T;
        /** Available blocks for unprivileged users */
        bavail: T;
        /** Total file nodes in file system. */
        files: T;
        /** Free file nodes in file system. */
        ffree: T;
    }

    export interface StatsFs extends StatsFsBase<number> {}

    /**
     * Provides information about a mounted file system
     *
     * Objects returned from {@link statfs} and {@link statfsSync} are of this type.
     * If `bigint` in the `options` passed to those methods is true, the numeric values
     * will be `bigint` instead of `number`.
     * @since  v18.15.0
     */
    export class StatsFs {}

    export interface BigIntStatsFs extends StatsFsBase<bigint> {}

    export interface StatFsOptions {
        bigint?: boolean | undefined;
    }

    /**
     * A representation of a directory entry, which can be a file or a subdirectory
     * within the directory, as returned by reading from an `fs.Dir`. The
     * directory entry is a combination of the file name and file type pairs.
     *
     * Additionally, when {@link readdir} or {@link readdirSync} is called with
     * the `withFileTypes` option set to `true`, the resulting array is filled with `fs.Dirent` objects, rather than strings or `Buffer` s.
     * @since v10.10.0
     */
    export class Dirent {
        /**
         * Returns `true` if the `fs.Dirent` object describes a regular file.
         * @since v10.10.0
         */
        isFile(): boolean;
        /**
         * Returns `true` if the `fs.Dirent` object describes a file system
         * directory.
         * @since v10.10.0
         */
        isDirectory(): boolean;
        /**
         * Returns `true` if the `fs.Dirent` object describes a block device.
         * @since v10.10.0
         */
        isBlockDevice(): boolean;
        /**
         * Returns `true` if the `fs.Dirent` object describes a character device.
         * @since v10.10.0
         */
        isCharacterDevice(): boolean;
        /**
         * Returns `true` if the `fs.Dirent` object describes a symbolic link.
         * @since v10.10.0
         */
        isSymbolicLink(): boolean;
        /**
         * Returns `true` if the `fs.Dirent` object describes a first-in-first-out
         * (FIFO) pipe.
         * @since v10.10.0
         */
        isFIFO(): boolean;
        /**
         * Returns `true` if the `fs.Dirent` object describes a socket.
         * @since v10.10.0
         */
        isSocket(): boolean;
        /**
         * The file name that this `fs.Dirent` object refers to. The type of this
         * value is determined by the `options.encoding` passed to {@link readdir} or {@link readdirSync}.
         * @since v10.10.0
         */
        name: string;
        /**
         * The base path that this `fs.Dirent` object refers to.
         * @since v18.17.0
         */
        path: string;
    }
    /**
     * A class representing a directory stream.
     *
     * Created by {@link opendir}, {@link opendirSync}, or `fsPromises.opendir()`.
     *
     * ```js
     * import { opendir } from 'fs/promises';
     *
     * try {
     *   const dir = await opendir('./');
     *   for await (const dirent of dir)
     *     console.log(dirent.name);
     * } catch (err) {
     *   console.error(err);
     * }
     * ```
     *
     * When using the async iterator, the `fs.Dir` object will be automatically
     * closed after the iterator exits.
     * @since v12.12.0
     */
    export class Dir implements AsyncIterable<Dirent> {
        /**
         * The read-only path of this directory as was provided to {@link opendir},{@link opendirSync}, or `fsPromises.opendir()`.
         * @since v12.12.0
         */
        readonly path: string;
        /**
         * Asynchronously iterates over the directory via `readdir(3)` until all entries have been read.
         */
        [Symbol.asyncIterator](): AsyncIterableIterator<Dirent>;
        /**
         * Asynchronously close the directory's underlying resource handle.
         * Subsequent reads will result in errors.
         *
         * A promise is returned that will be resolved after the resource has been
         * closed.
         * @since v12.12.0
         */
        close(): Promise<void>;
        close(cb: NoParamCallback): void;
        /**
         * Synchronously close the directory's underlying resource handle.
         * Subsequent reads will result in errors.
         * @since v12.12.0
         */
        closeSync(): void;
        /**
         * Asynchronously read the next directory entry via [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) as an `fs.Dirent`.
         *
         * A promise is returned that will be resolved with an `fs.Dirent`, or `null`if there are no more directory entries to read.
         *
         * Directory entries returned by this function are in no particular order as
         * provided by the operating system's underlying directory mechanisms.
         * Entries added or removed while iterating over the directory might not be
         * included in the iteration results.
         * @since v12.12.0
         * @return containing {fs.Dirent|null}
         */
        read(): Promise<Dirent | null>;
        read(cb: (err: NodeJS.ErrnoException | null, dirEnt: Dirent | null) => void): void;
        /**
         * Synchronously read the next directory entry as an `fs.Dirent`. See the
         * POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more detail.
         *
         * If there are no more directory entries to read, `null` will be returned.
         *
         * Directory entries returned by this function are in no particular order as
         * provided by the operating system's underlying directory mechanisms.
         * Entries added or removed while iterating over the directory might not be
         * included in the iteration results.
         * @since v12.12.0
         */
        readSync(): Dirent | null;
    }
    /**
     * Class: fs.StatWatcher
     * @since v14.3.0, v12.20.0
     * Extends `EventEmitter`
     * A successful call to {@link watchFile} method will return a new fs.StatWatcher object.
     */
    export interface StatWatcher extends EventEmitter {
        /**
         * When called, requests that the Node.js event loop _not_ exit so long as the `fs.StatWatcher` is active. Calling `watcher.ref()` multiple times will have
         * no effect.
         *
         * By default, all `fs.StatWatcher` objects are "ref'ed", making it normally
         * unnecessary to call `watcher.ref()` unless `watcher.unref()` had been
         * called previously.
         * @since v14.3.0, v12.20.0
         */
        ref(): this;
        /**
         * When called, the active `fs.StatWatcher` object will not require the Node.js
         * event loop to remain active. If there is no other activity keeping the
         * event loop running, the process may exit before the `fs.StatWatcher` object's
         * callback is invoked. Calling `watcher.unref()` multiple times will have
         * no effect.
         * @since v14.3.0, v12.20.0
         */
        unref(): this;
    }
    export interface FSWatcher extends EventEmitter {
        /**
         * Stop watching for changes on the given `fs.FSWatcher`. Once stopped, the `fs.FSWatcher` object is no longer usable.
         * @since v0.5.8
         */
        close(): void;
        /**
         * events.EventEmitter
         *   1. change
         *   2. error
         */
        addListener(event: string, listener: (...args: any[]) => void): this;
        addListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
        addListener(event: 'error', listener: (error: Error) => void): this;
        addListener(event: 'close', listener: () => void): this;
        on(event: string, listener: (...args: any[]) => void): this;
        on(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
        on(event: 'error', listener: (error: Error) => void): this;
        on(event: 'close', listener: () => void): this;
        once(event: string, listener: (...args: any[]) => void): this;
        once(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
        once(event: 'error', listener: (error: Error) => void): this;
        once(event: 'close', listener: () => void): this;
        prependListener(event: string, listener: (...args: any[]) => void): this;
        prependListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
        prependListener(event: 'error', listener: (error: Error) => void): this;
        prependListener(event: 'close', listener: () => void): this;
        prependOnceListener(event: string, listener: (...args: any[]) => void): this;
        prependOnceListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
        prependOnceListener(event: 'error', listener: (error: Error) => void): this;
        prependOnceListener(event: 'close', listener: () => void): this;
    }
    /**
     * Instances of `fs.ReadStream` are created and returned using the {@link createReadStream} function.
     * @since v0.1.93
     */
    export class ReadStream extends stream.Readable {
        close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
        /**
         * The number of bytes that have been read so far.
         * @since v6.4.0
         */
        bytesRead: number;
        /**
         * The path to the file the stream is reading from as specified in the first
         * argument to `fs.createReadStream()`. If `path` is passed as a string, then`readStream.path` will be a string. If `path` is passed as a `Buffer`, then`readStream.path` will be a
         * `Buffer`. If `fd` is specified, then`readStream.path` will be `undefined`.
         * @since v0.1.93
         */
        path: string | Buffer;
        /**
         * This property is `true` if the underlying file has not been opened yet,
         * i.e. before the `'ready'` event is emitted.
         * @since v11.2.0, v10.16.0
         */
        pending: boolean;
        /**
         * events.EventEmitter
         *   1. open
         *   2. close
         *   3. ready
         */
        addListener(event: 'close', listener: () => void): this;
        addListener(event: 'data', listener: (chunk: Buffer | string) => void): this;
        addListener(event: 'end', listener: () => void): this;
        addListener(event: 'error', listener: (err: Error) => void): this;
        addListener(event: 'open', listener: (fd: number) => void): this;
        addListener(event: 'pause', listener: () => void): this;
        addListener(event: 'readable', listener: () => void): this;
        addListener(event: 'ready', listener: () => void): this;
        addListener(event: 'resume', listener: () => void): this;
        addListener(event: string | symbol, listener: (...args: any[]) => void): this;
        on(event: 'close', listener: () => void): this;
        on(event: 'data', listener: (chunk: Buffer | string) => void): this;
        on(event: 'end', listener: () => void): this;
        on(event: 'error', listener: (err: Error) => void): this;
        on(event: 'open', listener: (fd: number) => void): this;
        on(event: 'pause', listener: () => void): this;
        on(event: 'readable', listener: () => void): this;
        on(event: 'ready', listener: () => void): this;
        on(event: 'resume', listener: () => void): this;
        on(event: string | symbol, listener: (...args: any[]) => void): this;
        once(event: 'close', listener: () => void): this;
        once(event: 'data', listener: (chunk: Buffer | string) => void): this;
        once(event: 'end', listener: () => void): this;
        once(event: 'error', listener: (err: Error) => void): this;
        once(event: 'open', listener: (fd: number) => void): this;
        once(event: 'pause', listener: () => void): this;
        once(event: 'readable', listener: () => void): this;
        once(event: 'ready', listener: () => void): this;
        once(event: 'resume', listener: () => void): this;
        once(event: string | symbol, listener: (...args: any[]) => void): this;
        prependListener(event: 'close', listener: () => void): this;
        prependListener(event: 'data', listener: (chunk: Buffer | string) => void): this;
        prependListener(event: 'end', listener: () => void): this;
        prependListener(event: 'error', listener: (err: Error) => void): this;
        prependListener(event: 'open', listener: (fd: number) => void): this;
        prependListener(event: 'pause', listener: () => void): this;
        prependListener(event: 'readable', listener: () => void): this;
        prependListener(event: 'ready', listener: () => void): this;
        prependListener(event: 'resume', listener: () => void): this;
        prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
        prependOnceListener(event: 'close', listener: () => void): this;
        prependOnceListener(event: 'data', listener: (chunk: Buffer | string) => void): this;
        prependOnceListener(event: 'end', listener: () => void): this;
        prependOnceListener(event: 'error', listener: (err: Error) => void): this;
        prependOnceListener(event: 'open', listener: (fd: number) => void): this;
        prependOnceListener(event: 'pause', listener: () => void): this;
        prependOnceListener(event: 'readable', listener: () => void): this;
        prependOnceListener(event: 'ready', listener: () => void): this;
        prependOnceListener(event: 'resume', listener: () => void): this;
        prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
    }
    /**
     * * Extends `stream.Writable`
     *
     * Instances of `fs.WriteStream` are created and returned using the {@link createWriteStream} function.
     * @since v0.1.93
     */
    export class WriteStream extends stream.Writable {
        /**
         * Closes `writeStream`. Optionally accepts a
         * callback that will be executed once the `writeStream`is closed.
         * @since v0.9.4
         */
        close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
        /**
         * The number of bytes written so far. Does not include data that is still queued
         * for writing.
         * @since v0.4.7
         */
        bytesWritten: number;
        /**
         * The path to the file the stream is writing to as specified in the first
         * argument to {@link createWriteStream}. If `path` is passed as a string, then`writeStream.path` will be a string. If `path` is passed as a `Buffer`, then`writeStream.path` will be a
         * `Buffer`.
         * @since v0.1.93
         */
        path: string | Buffer;
        /**
         * This property is `true` if the underlying file has not been opened yet,
         * i.e. before the `'ready'` event is emitted.
         * @since v11.2.0
         */
        pending: boolean;
        /**
         * events.EventEmitter
         *   1. open
         *   2. close
         *   3. ready
         */
        addListener(event: 'close', listener: () => void): this;
        addListener(event: 'drain', listener: () => void): this;
        addListener(event: 'error', listener: (err: Error) => void): this;
        addListener(event: 'finish', listener: () => void): this;
        addListener(event: 'open', listener: (fd: number) => void): this;
        addListener(event: 'pipe', listener: (src: stream.Readable) => void): this;
        addListener(event: 'ready', listener: () => void): this;
        addListener(event: 'unpipe', listener: (src: stream.Readable) => void): this;
        addListener(event: string | symbol, listener: (...args: any[]) => void): this;
        on(event: 'close', listener: () => void): this;
        on(event: 'drain', listener: () => void): this;
        on(event: 'error', listener: (err: Error) => void): this;
        on(event: 'finish', listener: () => void): this;
        on(event: 'open', listener: (fd: number) => void): this;
        on(event: 'pipe', listener: (src: stream.Readable) => void): this;
        on(event: 'ready', listener: () => void): this;
        on(event: 'unpipe', listener: (src: stream.Readable) => void): this;
        on(event: string | symbol, listener: (...args: any[]) => void): this;
        once(event: 'close', listener: () => void): this;
        once(event: 'drain', listener: () => void): this;
        once(event: 'error', listener: (err: Error) => void): this;
        once(event: 'finish', listener: () => void): this;
        once(event: 'open', listener: (fd: number) => void): this;
        once(event: 'pipe', listener: (src: stream.Readable) => void): this;
        once(event: 'ready', listener: () => void): this;
        once(event: 'unpipe', listener: (src: stream.Readable) => void): this;
        once(event: string | symbol, listener: (...args: any[]) => void): this;
        prependListener(event: 'close', listener: () => void): this;
        prependListener(event: 'drain', listener: () => void): this;
        prependListener(event: 'error', listener: (err: Error) => void): this;
        prependListener(event: 'finish', listener: () => void): this;
        prependListener(event: 'open', listener: (fd: number) => void): this;
        prependListener(event: 'pipe', listener: (src: stream.Readable) => void): this;
        prependListener(event: 'ready', listener: () => void): this;
        prependListener(event: 'unpipe', listener: (src: stream.Readable) => void): this;
        prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
        prependOnceListener(event: 'close', listener: () => void): this;
        prependOnceListener(event: 'drain', listener: () => void): this;
        prependOnceListener(event: 'error', listener: (err: Error) => void): this;
        prependOnceListener(event: 'finish', listener: () => void): this;
        prependOnceListener(event: 'open', listener: (fd: number) => void): this;
        prependOnceListener(event: 'pipe', listener: (src: stream.Readable) => void): this;
        prependOnceListener(event: 'ready', listener: () => void): this;
        prependOnceListener(event: 'unpipe', listener: (src: stream.Readable) => void): this;
        prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
    }
    /**
     * Asynchronously rename file at `oldPath` to the pathname provided
     * as `newPath`. In the case that `newPath` already exists, it will
     * be overwritten. If there is a directory at `newPath`, an error will
     * be raised instead. No arguments other than a possible exception are
     * given to the completion callback.
     *
     * See also: [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html).
     *
     * ```js
     * import { rename } from 'fs';
     *
     * rename('oldFile.txt', 'newFile.txt', (err) => {
     *   if (err) throw err;
     *   console.log('Rename complete!');
     * });
     * ```
     * @since v0.0.2
     */
    export function rename(oldPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;
    export namespace rename {
        /**
         * Asynchronous rename(2) - Change the name or location of a file or directory.
         * @param oldPath A path to a file. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         * @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         */
        function __promisify__(oldPath: PathLike, newPath: PathLike): Promise<void>;
    }
    /**
     * Renames the file from `oldPath` to `newPath`. Returns `undefined`.
     *
     * See the POSIX [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html) documentation for more details.
     * @since v0.1.21
     */
    export function renameSync(oldPath: PathLike, newPath: PathLike): void;
    /**
     * Truncates the file. No arguments other than a possible exception are
     * given to the completion callback. A file descriptor can also be passed as the
     * first argument. In this case, `fs.ftruncate()` is called.
     *
     * ```js
     * import { truncate } from 'fs';
     * // Assuming that 'path/file.txt' is a regular file.
     * truncate('path/file.txt', (err) => {
     *   if (err) throw err;
     *   console.log('path/file.txt was truncated');
     * });
     * ```
     *
     * Passing a file descriptor is deprecated and may result in an error being thrown
     * in the future.
     *
     * See the POSIX [`truncate(2)`](http://man7.org/linux/man-pages/man2/truncate.2.html) documentation for more details.
     * @since v0.8.6
     * @param [len=0]
     */
    export function truncate(path: PathLike, len: number | undefined | null, callback: NoParamCallback): void;
    /**
     * Asynchronous truncate(2) - Truncate a file to a specified length.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export function truncate(path: PathLike, callback: NoParamCallback): void;
    export namespace truncate {
        /**
         * Asynchronous truncate(2) - Truncate a file to a specified length.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param len If not specified, defaults to `0`.
         */
        function __promisify__(path: PathLike, len?: number | null): Promise<void>;
    }
    /**
     * Truncates the file. Returns `undefined`. A file descriptor can also be
     * passed as the first argument. In this case, `fs.ftruncateSync()` is called.
     *
     * Passing a file descriptor is deprecated and may result in an error being thrown
     * in the future.
     * @since v0.8.6
     * @param [len=0]
     */
    export function truncateSync(path: PathLike, len?: number | null): void;
    /**
     * Truncates the file descriptor. No arguments other than a possible exception are
     * given to the completion callback.
     *
     * See the POSIX [`ftruncate(2)`](http://man7.org/linux/man-pages/man2/ftruncate.2.html) documentation for more detail.
     *
     * If the file referred to by the file descriptor was larger than `len` bytes, only
     * the first `len` bytes will be retained in the file.
     *
     * For example, the following program retains only the first four bytes of the
     * file:
     *
     * ```js
     * import { open, close, ftruncate } from 'fs';
     *
     * function closeFd(fd) {
     *   close(fd, (err) => {
     *     if (err) throw err;
     *   });
     * }
     *
     * open('temp.txt', 'r+', (err, fd) => {
     *   if (err) throw err;
     *
     *   try {
     *     ftruncate(fd, 4, (err) => {
     *       closeFd(fd);
     *       if (err) throw err;
     *     });
     *   } catch (err) {
     *     closeFd(fd);
     *     if (err) throw err;
     *   }
     * });
     * ```
     *
     * If the file previously was shorter than `len` bytes, it is extended, and the
     * extended part is filled with null bytes (`'\0'`):
     *
     * If `len` is negative then `0` will be used.
     * @since v0.8.6
     * @param [len=0]
     */
    export function ftruncate(fd: number, len: number | undefined | null, callback: NoParamCallback): void;
    /**
     * Asynchronous ftruncate(2) - Truncate a file to a specified length.
     * @param fd A file descriptor.
     */
    export function ftruncate(fd: number, callback: NoParamCallback): void;
    export namespace ftruncate {
        /**
         * Asynchronous ftruncate(2) - Truncate a file to a specified length.
         * @param fd A file descriptor.
         * @param len If not specified, defaults to `0`.
         */
        function __promisify__(fd: number, len?: number | null): Promise<void>;
    }
    /**
     * Truncates the file descriptor. Returns `undefined`.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link ftruncate}.
     * @since v0.8.6
     * @param [len=0]
     */
    export function ftruncateSync(fd: number, len?: number | null): void;
    /**
     * Asynchronously changes owner and group of a file. No arguments other than a
     * possible exception are given to the completion callback.
     *
     * See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail.
     * @since v0.1.97
     */
    export function chown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;
    export namespace chown {
        /**
         * Asynchronous chown(2) - Change ownership of a file.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         */
        function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>;
    }
    /**
     * Synchronously changes owner and group of a file. Returns `undefined`.
     * This is the synchronous version of {@link chown}.
     *
     * See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail.
     * @since v0.1.97
     */
    export function chownSync(path: PathLike, uid: number, gid: number): void;
    /**
     * Sets the owner of the file. No arguments other than a possible exception are
     * given to the completion callback.
     *
     * See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail.
     * @since v0.4.7
     */
    export function fchown(fd: number, uid: number, gid: number, callback: NoParamCallback): void;
    export namespace fchown {
        /**
         * Asynchronous fchown(2) - Change ownership of a file.
         * @param fd A file descriptor.
         */
        function __promisify__(fd: number, uid: number, gid: number): Promise<void>;
    }
    /**
     * Sets the owner of the file. Returns `undefined`.
     *
     * See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail.
     * @since v0.4.7
     * @param uid The file's new owner's user id.
     * @param gid The file's new group's group id.
     */
    export function fchownSync(fd: number, uid: number, gid: number): void;
    /**
     * Set the owner of the symbolic link. No arguments other than a possible
     * exception are given to the completion callback.
     *
     * See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more detail.
     */
    export function lchown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;
    export namespace lchown {
        /**
         * Asynchronous lchown(2) - Change ownership of a file. Does not dereference symbolic links.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         */
        function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>;
    }
    /**
     * Set the owner for the path. Returns `undefined`.
     *
     * See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more details.
     * @param uid The file's new owner's user id.
     * @param gid The file's new group's group id.
     */
    export function lchownSync(path: PathLike, uid: number, gid: number): void;
    /**
     * Changes the access and modification times of a file in the same way as {@link utimes}, with the difference that if the path refers to a symbolic
     * link, then the link is not dereferenced: instead, the timestamps of the
     * symbolic link itself are changed.
     *
     * No arguments other than a possible exception are given to the completion
     * callback.
     * @since v14.5.0, v12.19.0
     */
    export function lutimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
    export namespace lutimes {
        /**
         * Changes the access and modification times of a file in the same way as `fsPromises.utimes()`,
         * with the difference that if the path refers to a symbolic link, then the link is not
         * dereferenced: instead, the timestamps of the symbolic link itself are changed.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param atime The last access time. If a string is provided, it will be coerced to number.
         * @param mtime The last modified time. If a string is provided, it will be coerced to number.
         */
        function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
    }
    /**
     * Change the file system timestamps of the symbolic link referenced by `path`.
     * Returns `undefined`, or throws an exception when parameters are incorrect or
     * the operation fails. This is the synchronous version of {@link lutimes}.
     * @since v14.5.0, v12.19.0
     */
    export function lutimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void;
    /**
     * Asynchronously changes the permissions of a file. No arguments other than a
     * possible exception are given to the completion callback.
     *
     * See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail.
     *
     * ```js
     * import { chmod } from 'fs';
     *
     * chmod('my_file.txt', 0o775, (err) => {
     *   if (err) throw err;
     *   console.log('The permissions for file "my_file.txt" have been changed!');
     * });
     * ```
     * @since v0.1.30
     */
    export function chmod(path: PathLike, mode: Mode, callback: NoParamCallback): void;
    export namespace chmod {
        /**
         * Asynchronous chmod(2) - Change permissions of a file.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
         */
        function __promisify__(path: PathLike, mode: Mode): Promise<void>;
    }
    /**
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link chmod}.
     *
     * See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail.
     * @since v0.6.7
     */
    export function chmodSync(path: PathLike, mode: Mode): void;
    /**
     * Sets the permissions on the file. No arguments other than a possible exception
     * are given to the completion callback.
     *
     * See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail.
     * @since v0.4.7
     */
    export function fchmod(fd: number, mode: Mode, callback: NoParamCallback): void;
    export namespace fchmod {
        /**
         * Asynchronous fchmod(2) - Change permissions of a file.
         * @param fd A file descriptor.
         * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
         */
        function __promisify__(fd: number, mode: Mode): Promise<void>;
    }
    /**
     * Sets the permissions on the file. Returns `undefined`.
     *
     * See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail.
     * @since v0.4.7
     */
    export function fchmodSync(fd: number, mode: Mode): void;
    /**
     * Changes the permissions on a symbolic link. No arguments other than a possible
     * exception are given to the completion callback.
     *
     * This method is only implemented on macOS.
     *
     * See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail.
     * @deprecated Since v0.4.7
     */
    export function lchmod(path: PathLike, mode: Mode, callback: NoParamCallback): void;
    /** @deprecated */
    export namespace lchmod {
        /**
         * Asynchronous lchmod(2) - Change permissions of a file. Does not dereference symbolic links.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
         */
        function __promisify__(path: PathLike, mode: Mode): Promise<void>;
    }
    /**
     * Changes the permissions on a symbolic link. Returns `undefined`.
     *
     * This method is only implemented on macOS.
     *
     * See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail.
     * @deprecated Since v0.4.7
     */
    export function lchmodSync(path: PathLike, mode: Mode): void;
    /**
     * Asynchronous [`stat(2)`](http://man7.org/linux/man-pages/man2/stat.2.html). The callback gets two arguments `(err, stats)` where`stats` is an `fs.Stats` object.
     *
     * In case of an error, the `err.code` will be one of `Common System Errors`.
     *
     * Using `fs.stat()` to check for the existence of a file before calling`fs.open()`, `fs.readFile()` or `fs.writeFile()` is not recommended.
     * Instead, user code should open/read/write the file directly and handle the
     * error raised if the file is not available.
     *
     * To check if a file exists without manipulating it afterwards, {@link access} is recommended.
     *
     * For example, given the following directory structure:
     *
     * ```text
     * - txtDir
     * -- file.txt
     * - app.js
     * ```
     *
     * The next program will check for the stats of the given paths:
     *
     * ```js
     * import { stat } from 'fs';
     *
     * const pathsToCheck = ['./txtDir', './txtDir/file.txt'];
     *
     * for (let i = 0; i < pathsToCheck.length; i++) {
     *   stat(pathsToCheck[i], (err, stats) => {
     *     console.log(stats.isDirectory());
     *     console.log(stats);
     *   });
     * }
     * ```
     *
     * The resulting output will resemble:
     *
     * ```console
     * true
     * Stats {
     *   dev: 16777220,
     *   mode: 16877,
     *   nlink: 3,
     *   uid: 501,
     *   gid: 20,
     *   rdev: 0,
     *   blksize: 4096,
     *   ino: 14214262,
     *   size: 96,
     *   blocks: 0,
     *   atimeMs: 1561174653071.963,
     *   mtimeMs: 1561174614583.3518,
     *   ctimeMs: 1561174626623.5366,
     *   birthtimeMs: 1561174126937.2893,
     *   atime: 2019-06-22T03:37:33.072Z,
     *   mtime: 2019-06-22T03:36:54.583Z,
     *   ctime: 2019-06-22T03:37:06.624Z,
     *   birthtime: 2019-06-22T03:28:46.937Z
     * }
     * false
     * Stats {
     *   dev: 16777220,
     *   mode: 33188,
     *   nlink: 1,
     *   uid: 501,
     *   gid: 20,
     *   rdev: 0,
     *   blksize: 4096,
     *   ino: 14214074,
     *   size: 8,
     *   blocks: 8,
     *   atimeMs: 1561174616618.8555,
     *   mtimeMs: 1561174614584,
     *   ctimeMs: 1561174614583.8145,
     *   birthtimeMs: 1561174007710.7478,
     *   atime: 2019-06-22T03:36:56.619Z,
     *   mtime: 2019-06-22T03:36:54.584Z,
     *   ctime: 2019-06-22T03:36:54.584Z,
     *   birthtime: 2019-06-22T03:26:47.711Z
     * }
     * ```
     * @since v0.0.2
     */
    export function stat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
    export function stat(
        path: PathLike,
        options:
            | (StatOptions & {
                  bigint?: false | undefined;
              })
            | undefined,
        callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void
    ): void;
    export function stat(
        path: PathLike,
        options: StatOptions & {
            bigint: true;
        },
        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void
    ): void;
    export function stat(path: PathLike, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void;
    export namespace stat {
        /**
         * Asynchronous stat(2) - Get file status.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         */
        function __promisify__(
            path: PathLike,
            options?: StatOptions & {
                bigint?: false | undefined;
            }
        ): Promise<Stats>;
        function __promisify__(
            path: PathLike,
            options: StatOptions & {
                bigint: true;
            }
        ): Promise<BigIntStats>;
        function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>;
    }
    export interface StatSyncFn extends Function {
        (path: PathLike, options?: undefined): Stats;
        (
            path: PathLike,
            options?: StatSyncOptions & {
                bigint?: false | undefined;
                throwIfNoEntry: false;
            }
        ): Stats | undefined;
        (
            path: PathLike,
            options: StatSyncOptions & {
                bigint: true;
                throwIfNoEntry: false;
            }
        ): BigIntStats | undefined;
        (
            path: PathLike,
            options?: StatSyncOptions & {
                bigint?: false | undefined;
            }
        ): Stats;
        (
            path: PathLike,
            options: StatSyncOptions & {
                bigint: true;
            }
        ): BigIntStats;
        (
            path: PathLike,
            options: StatSyncOptions & {
                bigint: boolean;
                throwIfNoEntry?: false | undefined;
            }
        ): Stats | BigIntStats;
        (path: PathLike, options?: StatSyncOptions): Stats | BigIntStats | undefined;
    }
    /**
     * Synchronous stat(2) - Get file status.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export const statSync: StatSyncFn;
    /**
     * Invokes the callback with the `fs.Stats` for the file descriptor.
     *
     * See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail.
     * @since v0.1.95
     */
    export function fstat(fd: number, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
    export function fstat(
        fd: number,
        options:
            | (StatOptions & {
                  bigint?: false | undefined;
              })
            | undefined,
        callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void
    ): void;
    export function fstat(
        fd: number,
        options: StatOptions & {
            bigint: true;
        },
        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void
    ): void;
    export function fstat(fd: number, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void;
    export namespace fstat {
        /**
         * Asynchronous fstat(2) - Get file status.
         * @param fd A file descriptor.
         */
        function __promisify__(
            fd: number,
            options?: StatOptions & {
                bigint?: false | undefined;
            }
        ): Promise<Stats>;
        function __promisify__(
            fd: number,
            options: StatOptions & {
                bigint: true;
            }
        ): Promise<BigIntStats>;
        function __promisify__(fd: number, options?: StatOptions): Promise<Stats | BigIntStats>;
    }
    /**
     * Retrieves the `fs.Stats` for the file descriptor.
     *
     * See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail.
     * @since v0.1.95
     */
    export function fstatSync(
        fd: number,
        options?: StatOptions & {
            bigint?: false | undefined;
        }
    ): Stats;
    export function fstatSync(
        fd: number,
        options: StatOptions & {
            bigint: true;
        }
    ): BigIntStats;
    export function fstatSync(fd: number, options?: StatOptions): Stats | BigIntStats;
    /**
     * Retrieves the `fs.Stats` for the symbolic link referred to by the path.
     * The callback gets two arguments `(err, stats)` where `stats` is a `fs.Stats` object. `lstat()` is identical to `stat()`, except that if `path` is a symbolic
     * link, then the link itself is stat-ed, not the file that it refers to.
     *
     * See the POSIX [`lstat(2)`](http://man7.org/linux/man-pages/man2/lstat.2.html) documentation for more details.
     * @since v0.1.30
     */
    export function lstat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
    export function lstat(
        path: PathLike,
        options:
            | (StatOptions & {
                  bigint?: false | undefined;
              })
            | undefined,
        callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void
    ): void;
    export function lstat(
        path: PathLike,
        options: StatOptions & {
            bigint: true;
        },
        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void
    ): void;
    export function lstat(path: PathLike, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void;
    export namespace lstat {
        /**
         * Asynchronous lstat(2) - Get file status. Does not dereference symbolic links.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         */
        function __promisify__(
            path: PathLike,
            options?: StatOptions & {
                bigint?: false | undefined;
            }
        ): Promise<Stats>;
        function __promisify__(
            path: PathLike,
            options: StatOptions & {
                bigint: true;
            }
        ): Promise<BigIntStats>;
        function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>;
    }
    /**
     * Asynchronous statfs(2). Returns information about the mounted file system which contains path. The callback gets two arguments (err, stats) where stats is an <fs.StatFs> object.
     * In case of an error, the err.code will be one of Common System Errors.
     * @param path A path to an existing file or directory on the file system to be queried.
     * @param callback
     */
    export function statfs(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: StatsFs) => void): void;
    export function statfs(
        path: PathLike,
        options:
            | (StatFsOptions & {
                  bigint?: false | undefined;
              })
            | undefined,
        callback: (err: NodeJS.ErrnoException | null, stats: StatsFs) => void
    ): void;
    export function statfs(
        path: PathLike,
        options: StatFsOptions & {
            bigint: true;
        },
        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStatsFs) => void
    ): void;
    export function statfs(path: PathLike, options: StatFsOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: StatsFs | BigIntStatsFs) => void): void;
    export namespace statfs {
        /**
         * Asynchronous statfs(2) - Returns information about the mounted file system which contains path. The callback gets two arguments (err, stats) where stats is an <fs.StatFs> object.
         * @param path A path to an existing file or directory on the file system to be queried.
         */
        function __promisify__(
            path: PathLike,
            options?: StatFsOptions & {
                bigint?: false | undefined;
            }
        ): Promise<StatsFs>;
        function __promisify__(
            path: PathLike,
            options: StatFsOptions & {
                bigint: true;
            }
        ): Promise<BigIntStatsFs>;
        function __promisify__(path: PathLike, options?: StatFsOptions): Promise<StatsFs | BigIntStatsFs>;
    }

    /**
     * Synchronous statfs(2). Returns information about the mounted file system which contains path. The callback gets two arguments (err, stats) where stats is an <fs.StatFs> object.
     * In case of an error, the err.code will be one of Common System Errors.
     * @param path A path to an existing file or directory on the file system to be queried.
     * @param callback
     */
    export function statfsSync(
        path: PathLike,
        options?: StatFsOptions & {
            bigint?: false | undefined;
        }
    ): StatsFs;
    export function statfsSync(
        path: PathLike,
        options: StatFsOptions & {
            bigint: true;
        }
    ): BigIntStatsFs;

    export function statfsSync(path: PathLike, options?: StatFsOptions): StatsFs | BigIntStatsFs;
    /**
     * Synchronous lstat(2) - Get file status. Does not dereference symbolic links.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export const lstatSync: StatSyncFn;
    /**
     * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. No arguments other than
     * a possible
     * exception are given to the completion callback.
     * @since v0.1.31
     */
    export function link(existingPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;
    export namespace link {
        /**
         * Asynchronous link(2) - Create a new link (also known as a hard link) to an existing file.
         * @param existingPath A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol.
         */
        function __promisify__(existingPath: PathLike, newPath: PathLike): Promise<void>;
    }
    /**
     * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. Returns `undefined`.
     * @since v0.1.31
     */
    export function linkSync(existingPath: PathLike, newPath: PathLike): void;
    /**
     * Creates the link called `path` pointing to `target`. No arguments other than a
     * possible exception are given to the completion callback.
     *
     * See the POSIX [`symlink(2)`](http://man7.org/linux/man-pages/man2/symlink.2.html) documentation for more details.
     *
     * The `type` argument is only available on Windows and ignored on other platforms.
     * It can be set to `'dir'`, `'file'`, or `'junction'`. If the `type` argument is
     * not set, Node.js will autodetect `target` type and use `'file'` or `'dir'`. If
     * the `target` does not exist, `'file'` will be used. Windows junction points
     * require the destination path to be absolute. When using `'junction'`, the`target` argument will automatically be normalized to absolute path.
     *
     * Relative targets are relative to the link’s parent directory.
     *
     * ```js
     * import { symlink } from 'fs';
     *
     * symlink('./mew', './mewtwo', callback);
     * ```
     *
     * The above example creates a symbolic link `mewtwo` which points to `mew` in the
     * same directory:
     *
     * ```bash
     * $ tree .
     * .
     * ├── mew
     * └── mewtwo -> ./mew
     * ```
     * @since v0.1.31
     */
    export function symlink(target: PathLike, path: PathLike, type: symlink.Type | undefined | null, callback: NoParamCallback): void;
    /**
     * Asynchronous symlink(2) - Create a new symbolic link to an existing file.
     * @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol.
     * @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol.
     */
    export function symlink(target: PathLike, path: PathLike, callback: NoParamCallback): void;
    export namespace symlink {
        /**
         * Asynchronous symlink(2) - Create a new symbolic link to an existing file.
         * @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol.
         * @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol.
         * @param type May be set to `'dir'`, `'file'`, or `'junction'` (default is `'file'`) and is only available on Windows (ignored on other platforms).
         * When using `'junction'`, the `target` argument will automatically be normalized to an absolute path.
         */
        function __promisify__(target: PathLike, path: PathLike, type?: string | null): Promise<void>;
        type Type = 'dir' | 'file' | 'junction';
    }
    /**
     * Returns `undefined`.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link symlink}.
     * @since v0.1.31
     */
    export function symlinkSync(target: PathLike, path: PathLike, type?: symlink.Type | null): void;
    /**
     * Reads the contents of the symbolic link referred to by `path`. The callback gets
     * two arguments `(err, linkString)`.
     *
     * See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details.
     *
     * The optional `options` argument can be a string specifying an encoding, or an
     * object with an `encoding` property specifying the character encoding to use for
     * the link path passed to the callback. If the `encoding` is set to `'buffer'`,
     * the link path returned will be passed as a `Buffer` object.
     * @since v0.1.31
     */
    export function readlink(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, linkString: string) => void): void;
    /**
     * Asynchronous readlink(2) - read value of a symbolic link.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readlink(path: PathLike, options: BufferEncodingOption, callback: (err: NodeJS.ErrnoException | null, linkString: Buffer) => void): void;
    /**
     * Asynchronous readlink(2) - read value of a symbolic link.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readlink(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, linkString: string | Buffer) => void): void;
    /**
     * Asynchronous readlink(2) - read value of a symbolic link.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export function readlink(path: PathLike, callback: (err: NodeJS.ErrnoException | null, linkString: string) => void): void;
    export namespace readlink {
        /**
         * Asynchronous readlink(2) - read value of a symbolic link.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>;
        /**
         * Asynchronous readlink(2) - read value of a symbolic link.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<Buffer>;
        /**
         * Asynchronous readlink(2) - read value of a symbolic link.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | Buffer>;
    }
    /**
     * Returns the symbolic link's string value.
     *
     * See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details.
     *
     * The optional `options` argument can be a string specifying an encoding, or an
     * object with an `encoding` property specifying the character encoding to use for
     * the link path returned. If the `encoding` is set to `'buffer'`,
     * the link path returned will be passed as a `Buffer` object.
     * @since v0.1.31
     */
    export function readlinkSync(path: PathLike, options?: EncodingOption): string;
    /**
     * Synchronous readlink(2) - read value of a symbolic link.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readlinkSync(path: PathLike, options: BufferEncodingOption): Buffer;
    /**
     * Synchronous readlink(2) - read value of a symbolic link.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readlinkSync(path: PathLike, options?: EncodingOption): string | Buffer;
    /**
     * Asynchronously computes the canonical pathname by resolving `.`, `..` and
     * symbolic links.
     *
     * A canonical pathname is not necessarily unique. Hard links and bind mounts can
     * expose a file system entity through many pathnames.
     *
     * This function behaves like [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html), with some exceptions:
     *
     * 1. No case conversion is performed on case-insensitive file systems.
     * 2. The maximum number of symbolic links is platform-independent and generally
     * (much) higher than what the native [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html) implementation supports.
     *
     * The `callback` gets two arguments `(err, resolvedPath)`. May use `process.cwd`to resolve relative paths.
     *
     * Only paths that can be converted to UTF8 strings are supported.
     *
     * The optional `options` argument can be a string specifying an encoding, or an
     * object with an `encoding` property specifying the character encoding to use for
     * the path passed to the callback. If the `encoding` is set to `'buffer'`,
     * the path returned will be passed as a `Buffer` object.
     *
     * If `path` resolves to a socket or a pipe, the function will return a system
     * dependent name for that object.
     * @since v0.1.31
     */
    export function realpath(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void;
    /**
     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function realpath(path: PathLike, options: BufferEncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: Buffer) => void): void;
    /**
     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function realpath(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | Buffer) => void): void;
    /**
     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export function realpath(path: PathLike, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void;
    export namespace realpath {
        /**
         * Asynchronous realpath(3) - return the canonicalized absolute pathname.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>;
        /**
         * Asynchronous realpath(3) - return the canonicalized absolute pathname.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<Buffer>;
        /**
         * Asynchronous realpath(3) - return the canonicalized absolute pathname.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | Buffer>;
        /**
         * Asynchronous [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html).
         *
         * The `callback` gets two arguments `(err, resolvedPath)`.
         *
         * Only paths that can be converted to UTF8 strings are supported.
         *
         * The optional `options` argument can be a string specifying an encoding, or an
         * object with an `encoding` property specifying the character encoding to use for
         * the path passed to the callback. If the `encoding` is set to `'buffer'`,
         * the path returned will be passed as a `Buffer` object.
         *
         * On Linux, when Node.js is linked against musl libc, the procfs file system must
         * be mounted on `/proc` in order for this function to work. Glibc does not have
         * this restriction.
         * @since v9.2.0
         */
        function native(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void;
        function native(path: PathLike, options: BufferEncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: Buffer) => void): void;
        function native(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | Buffer) => void): void;
        function native(path: PathLike, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void;
    }
    /**
     * Returns the resolved pathname.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link realpath}.
     * @since v0.1.31
     */
    export function realpathSync(path: PathLike, options?: EncodingOption): string;
    /**
     * Synchronous realpath(3) - return the canonicalized absolute pathname.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function realpathSync(path: PathLike, options: BufferEncodingOption): Buffer;
    /**
     * Synchronous realpath(3) - return the canonicalized absolute pathname.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function realpathSync(path: PathLike, options?: EncodingOption): string | Buffer;
    export namespace realpathSync {
        function native(path: PathLike, options?: EncodingOption): string;
        function native(path: PathLike, options: BufferEncodingOption): Buffer;
        function native(path: PathLike, options?: EncodingOption): string | Buffer;
    }
    /**
     * Asynchronously removes a file or symbolic link. No arguments other than a
     * possible exception are given to the completion callback.
     *
     * ```js
     * import { unlink } from 'fs';
     * // Assuming that 'path/file.txt' is a regular file.
     * unlink('path/file.txt', (err) => {
     *   if (err) throw err;
     *   console.log('path/file.txt was deleted');
     * });
     * ```
     *
     * `fs.unlink()` will not work on a directory, empty or otherwise. To remove a
     * directory, use {@link rmdir}.
     *
     * See the POSIX [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html) documentation for more details.
     * @since v0.0.2
     */
    export function unlink(path: PathLike, callback: NoParamCallback): void;
    export namespace unlink {
        /**
         * Asynchronous unlink(2) - delete a name and possibly the file it refers to.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         */
        function __promisify__(path: PathLike): Promise<void>;
    }
    /**
     * Synchronous [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html). Returns `undefined`.
     * @since v0.1.21
     */
    export function unlinkSync(path: PathLike): void;
    export interface RmDirOptions {
        /**
         * If an `EBUSY`, `EMFILE`, `ENFILE`, `ENOTEMPTY`, or
         * `EPERM` error is encountered, Node.js will retry the operation with a linear
         * backoff wait of `retryDelay` ms longer on each try. This option represents the
         * number of retries. This option is ignored if the `recursive` option is not
         * `true`.
         * @default 0
         */
        maxRetries?: number | undefined;
        /**
         * @deprecated since v14.14.0 In future versions of Node.js and will trigger a warning
         * `fs.rmdir(path, { recursive: true })` will throw if `path` does not exist or is a file.
         * Use `fs.rm(path, { recursive: true, force: true })` instead.
         *
         * If `true`, perform a recursive directory removal. In
         * recursive mode, operations are retried on failure.
         * @default false
         */
        recursive?: boolean | undefined;
        /**
         * The amount of time in milliseconds to wait between retries.
         * This option is ignored if the `recursive` option is not `true`.
         * @default 100
         */
        retryDelay?: number | undefined;
    }
    /**
     * Asynchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). No arguments other than a possible exception are given
     * to the completion callback.
     *
     * Using `fs.rmdir()` on a file (not a directory) results in an `ENOENT` error on
     * Windows and an `ENOTDIR` error on POSIX.
     *
     * To get a behavior similar to the `rm -rf` Unix command, use {@link rm} with options `{ recursive: true, force: true }`.
     * @since v0.0.2
     */
    export function rmdir(path: PathLike, callback: NoParamCallback): void;
    export function rmdir(path: PathLike, options: RmDirOptions, callback: NoParamCallback): void;
    export namespace rmdir {
        /**
         * Asynchronous rmdir(2) - delete a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         */
        function __promisify__(path: PathLike, options?: RmDirOptions): Promise<void>;
    }
    /**
     * Synchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). Returns `undefined`.
     *
     * Using `fs.rmdirSync()` on a file (not a directory) results in an `ENOENT` error
     * on Windows and an `ENOTDIR` error on POSIX.
     *
     * To get a behavior similar to the `rm -rf` Unix command, use {@link rmSync} with options `{ recursive: true, force: true }`.
     * @since v0.1.21
     */
    export function rmdirSync(path: PathLike, options?: RmDirOptions): void;
    export interface RmOptions {
        /**
         * When `true`, exceptions will be ignored if `path` does not exist.
         * @default false
         */
        force?: boolean | undefined;
        /**
         * If an `EBUSY`, `EMFILE`, `ENFILE`, `ENOTEMPTY`, or
         * `EPERM` error is encountered, Node.js will retry the operation with a linear
         * backoff wait of `retryDelay` ms longer on each try. This option represents the
         * number of retries. This option is ignored if the `recursive` option is not
         * `true`.
         * @default 0
         */
        maxRetries?: number | undefined;
        /**
         * If `true`, perform a recursive directory removal. In
         * recursive mode, operations are retried on failure.
         * @default false
         */
        recursive?: boolean | undefined;
        /**
         * The amount of time in milliseconds to wait between retries.
         * This option is ignored if the `recursive` option is not `true`.
         * @default 100
         */
        retryDelay?: number | undefined;
    }
    /**
     * Asynchronously removes files and directories (modeled on the standard POSIX `rm`utility). No arguments other than a possible exception are given to the
     * completion callback.
     * @since v14.14.0
     */
    export function rm(path: PathLike, callback: NoParamCallback): void;
    export function rm(path: PathLike, options: RmOptions, callback: NoParamCallback): void;
    export namespace rm {
        /**
         * Asynchronously removes files and directories (modeled on the standard POSIX `rm` utility).
         */
        function __promisify__(path: PathLike, options?: RmOptions): Promise<void>;
    }
    /**
     * Synchronously removes files and directories (modeled on the standard POSIX `rm`utility). Returns `undefined`.
     * @since v14.14.0
     */
    export function rmSync(path: PathLike, options?: RmOptions): void;
    export interface MakeDirectoryOptions {
        /**
         * Indicates whether parent folders should be created.
         * If a folder was created, the path to the first created folder will be returned.
         * @default false
         */
        recursive?: boolean | undefined;
        /**
         * A file mode. If a string is passed, it is parsed as an octal integer. If not specified
         * @default 0o777
         */
        mode?: Mode | undefined;
    }
    /**
     * Asynchronously creates a directory.
     *
     * The callback is given a possible exception and, if `recursive` is `true`, the
     * first directory path created, `(err[, path])`.`path` can still be `undefined` when `recursive` is `true`, if no directory was
     * created.
     *
     * The optional `options` argument can be an integer specifying `mode` (permission
     * and sticky bits), or an object with a `mode` property and a `recursive`property indicating whether parent directories should be created. Calling`fs.mkdir()` when `path` is a directory that
     * exists results in an error only
     * when `recursive` is false.
     *
     * ```js
     * import { mkdir } from 'fs';
     *
     * // Creates /tmp/a/apple, regardless of whether `/tmp` and /tmp/a exist.
     * mkdir('/tmp/a/apple', { recursive: true }, (err) => {
     *   if (err) throw err;
     * });
     * ```
     *
     * On Windows, using `fs.mkdir()` on the root directory even with recursion will
     * result in an error:
     *
     * ```js
     * import { mkdir } from 'fs';
     *
     * mkdir('/', { recursive: true }, (err) => {
     *   // => [Error: EPERM: operation not permitted, mkdir 'C:\']
     * });
     * ```
     *
     * See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details.
     * @since v0.1.8
     */
    export function mkdir(
        path: PathLike,
        options: MakeDirectoryOptions & {
            recursive: true;
        },
        callback: (err: NodeJS.ErrnoException | null, path?: string) => void
    ): void;
    /**
     * Asynchronous mkdir(2) - create a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
     */
    export function mkdir(
        path: PathLike,
        options:
            | Mode
            | (MakeDirectoryOptions & {
                  recursive?: false | undefined;
              })
            | null
            | undefined,
        callback: NoParamCallback
    ): void;
    /**
     * Asynchronous mkdir(2) - create a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
     */
    export function mkdir(path: PathLike, options: Mode | MakeDirectoryOptions | null | undefined, callback: (err: NodeJS.ErrnoException | null, path?: string) => void): void;
    /**
     * Asynchronous mkdir(2) - create a directory with a mode of `0o777`.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export function mkdir(path: PathLike, callback: NoParamCallback): void;
    export namespace mkdir {
        /**
         * Asynchronous mkdir(2) - create a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
         * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
         */
        function __promisify__(
            path: PathLike,
            options: MakeDirectoryOptions & {
                recursive: true;
            }
        ): Promise<string | undefined>;
        /**
         * Asynchronous mkdir(2) - create a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
         * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
         */
        function __promisify__(
            path: PathLike,
            options?:
                | Mode
                | (MakeDirectoryOptions & {
                      recursive?: false | undefined;
                  })
                | null
        ): Promise<void>;
        /**
         * Asynchronous mkdir(2) - create a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
         * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
         */
        function __promisify__(path: PathLike, options?: Mode | MakeDirectoryOptions | null): Promise<string | undefined>;
    }
    /**
     * Synchronously creates a directory. Returns `undefined`, or if `recursive` is`true`, the first directory path created.
     * This is the synchronous version of {@link mkdir}.
     *
     * See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details.
     * @since v0.1.21
     */
    export function mkdirSync(
        path: PathLike,
        options: MakeDirectoryOptions & {
            recursive: true;
        }
    ): string | undefined;
    /**
     * Synchronous mkdir(2) - create a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
     */
    export function mkdirSync(
        path: PathLike,
        options?:
            | Mode
            | (MakeDirectoryOptions & {
                  recursive?: false | undefined;
              })
            | null
    ): void;
    /**
     * Synchronous mkdir(2) - create a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
     */
    export function mkdirSync(path: PathLike, options?: Mode | MakeDirectoryOptions | null): string | undefined;
    /**
     * Creates a unique temporary directory.
     *
     * Generates six random characters to be appended behind a required`prefix` to create a unique temporary directory. Due to platform
     * inconsistencies, avoid trailing `X` characters in `prefix`. Some platforms,
     * notably the BSDs, can return more than six random characters, and replace
     * trailing `X` characters in `prefix` with random characters.
     *
     * The created directory path is passed as a string to the callback's second
     * parameter.
     *
     * The optional `options` argument can be a string specifying an encoding, or an
     * object with an `encoding` property specifying the character encoding to use.
     *
     * ```js
     * import { mkdtemp } from 'fs';
     *
     * mkdtemp(path.join(os.tmpdir(), 'foo-'), (err, directory) => {
     *   if (err) throw err;
     *   console.log(directory);
     *   // Prints: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2
     * });
     * ```
     *
     * The `fs.mkdtemp()` method will append the six randomly selected characters
     * directly to the `prefix` string. For instance, given a directory `/tmp`, if the
     * intention is to create a temporary directory _within_`/tmp`, the `prefix`must end with a trailing platform-specific path separator
     * (`require('path').sep`).
     *
     * ```js
     * import { tmpdir } from 'os';
     * import { mkdtemp } from 'fs';
     *
     * // The parent directory for the new temporary directory
     * const tmpDir = tmpdir();
     *
     * // This method is *INCORRECT*:
     * mkdtemp(tmpDir, (err, directory) => {
     *   if (err) throw err;
     *   console.log(directory);
     *   // Will print something similar to `/tmpabc123`.
     *   // A new temporary directory is created at the file system root
     *   // rather than *within* the /tmp directory.
     * });
     *
     * // This method is *CORRECT*:
     * import { sep } from 'path';
     * mkdtemp(`${tmpDir}${sep}`, (err, directory) => {
     *   if (err) throw err;
     *   console.log(directory);
     *   // Will print something similar to `/tmp/abc123`.
     *   // A new temporary directory is created within
     *   // the /tmp directory.
     * });
     * ```
     * @since v5.10.0
     */
    export function mkdtemp(prefix: string, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, folder: string) => void): void;
    /**
     * Asynchronously creates a unique temporary directory.
     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function mkdtemp(
        prefix: string,
        options:
            | 'buffer'
            | {
                  encoding: 'buffer';
              },
        callback: (err: NodeJS.ErrnoException | null, folder: Buffer) => void
    ): void;
    /**
     * Asynchronously creates a unique temporary directory.
     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function mkdtemp(prefix: string, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, folder: string | Buffer) => void): void;
    /**
     * Asynchronously creates a unique temporary directory.
     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
     */
    export function mkdtemp(prefix: string, callback: (err: NodeJS.ErrnoException | null, folder: string) => void): void;
    export namespace mkdtemp {
        /**
         * Asynchronously creates a unique temporary directory.
         * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(prefix: string, options?: EncodingOption): Promise<string>;
        /**
         * Asynchronously creates a unique temporary directory.
         * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(prefix: string, options: BufferEncodingOption): Promise<Buffer>;
        /**
         * Asynchronously creates a unique temporary directory.
         * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(prefix: string, options?: EncodingOption): Promise<string | Buffer>;
    }
    /**
     * Returns the created directory path.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link mkdtemp}.
     *
     * The optional `options` argument can be a string specifying an encoding, or an
     * object with an `encoding` property specifying the character encoding to use.
     * @since v5.10.0
     */
    export function mkdtempSync(prefix: string, options?: EncodingOption): string;
    /**
     * Synchronously creates a unique temporary directory.
     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function mkdtempSync(prefix: string, options: BufferEncodingOption): Buffer;
    /**
     * Synchronously creates a unique temporary directory.
     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function mkdtempSync(prefix: string, options?: EncodingOption): string | Buffer;
    /**
     * Reads the contents of a directory. The callback gets two arguments `(err, files)`where `files` is an array of the names of the files in the directory excluding`'.'` and `'..'`.
     *
     * See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details.
     *
     * The optional `options` argument can be a string specifying an encoding, or an
     * object with an `encoding` property specifying the character encoding to use for
     * the filenames passed to the callback. If the `encoding` is set to `'buffer'`,
     * the filenames returned will be passed as `Buffer` objects.
     *
     * If `options.withFileTypes` is set to `true`, the `files` array will contain `fs.Dirent` objects.
     * @since v0.1.8
     */
    export function readdir(
        path: PathLike,
        options:
            | {
                  encoding: BufferEncoding | null;
                  withFileTypes?: false | undefined;
                  recursive?: boolean | undefined;
              }
            | BufferEncoding
            | undefined
            | null,
        callback: (err: NodeJS.ErrnoException | null, files: string[]) => void
    ): void;
    /**
     * Asynchronous readdir(3) - read a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readdir(
        path: PathLike,
        options:
            | {
                  encoding: 'buffer';
                  withFileTypes?: false | undefined;
                  recursive?: boolean | undefined;
              }
            | 'buffer',
        callback: (err: NodeJS.ErrnoException | null, files: Buffer[]) => void
    ): void;
    /**
     * Asynchronous readdir(3) - read a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readdir(
        path: PathLike,
        options:
            | (ObjectEncodingOptions & {
                  withFileTypes?: false | undefined;
                  recursive?: boolean | undefined;
              })
            | BufferEncoding
            | undefined
            | null,
        callback: (err: NodeJS.ErrnoException | null, files: string[] | Buffer[]) => void
    ): void;
    /**
     * Asynchronous readdir(3) - read a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export function readdir(path: PathLike, callback: (err: NodeJS.ErrnoException | null, files: string[]) => void): void;
    /**
     * Asynchronous readdir(3) - read a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
     */
    export function readdir(
        path: PathLike,
        options: ObjectEncodingOptions & {
            withFileTypes: true;
            recursive?: boolean | undefined;
        },
        callback: (err: NodeJS.ErrnoException | null, files: Dirent[]) => void
    ): void;
    export namespace readdir {
        /**
         * Asynchronous readdir(3) - read a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(
            path: PathLike,
            options?:
                | {
                      encoding: BufferEncoding | null;
                      withFileTypes?: false | undefined;
                      recursive?: boolean | undefined;
                  }
                | BufferEncoding
                | null
        ): Promise<string[]>;
        /**
         * Asynchronous readdir(3) - read a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(
            path: PathLike,
            options:
                | 'buffer'
                | {
                      encoding: 'buffer';
                      withFileTypes?: false | undefined;
                      recursive?: boolean | undefined;
                  }
        ): Promise<Buffer[]>;
        /**
         * Asynchronous readdir(3) - read a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
         */
        function __promisify__(
            path: PathLike,
            options?:
                | (ObjectEncodingOptions & {
                      withFileTypes?: false | undefined;
                      recursive?: boolean | undefined;
                  })
                | BufferEncoding
                | null
        ): Promise<string[] | Buffer[]>;
        /**
         * Asynchronous readdir(3) - read a directory.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param options If called with `withFileTypes: true` the result data will be an array of Dirent
         */
        function __promisify__(
            path: PathLike,
            options: ObjectEncodingOptions & {
                withFileTypes: true;
                recursive?: boolean | undefined;
            }
        ): Promise<Dirent[]>;
    }
    /**
     * Reads the contents of the directory.
     *
     * See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details.
     *
     * The optional `options` argument can be a string specifying an encoding, or an
     * object with an `encoding` property specifying the character encoding to use for
     * the filenames returned. If the `encoding` is set to `'buffer'`,
     * the filenames returned will be passed as `Buffer` objects.
     *
     * If `options.withFileTypes` is set to `true`, the result will contain `fs.Dirent` objects.
     * @since v0.1.21
     */
    export function readdirSync(
        path: PathLike,
        options?:
            | {
                  encoding: BufferEncoding | null;
                  withFileTypes?: false | undefined;
                  recursive?: boolean | undefined;
              }
            | BufferEncoding
            | null
    ): string[];
    /**
     * Synchronous readdir(3) - read a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readdirSync(
        path: PathLike,
        options:
            | {
                  encoding: 'buffer';
                  withFileTypes?: false | undefined;
                  recursive?: boolean | undefined;
              }
            | 'buffer'
    ): Buffer[];
    /**
     * Synchronous readdir(3) - read a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    export function readdirSync(
        path: PathLike,
        options?:
            | (ObjectEncodingOptions & {
                  withFileTypes?: false | undefined;
                  recursive?: boolean | undefined;
              })
            | BufferEncoding
            | null
    ): string[] | Buffer[];
    /**
     * Synchronous readdir(3) - read a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
     */
    export function readdirSync(
        path: PathLike,
        options: ObjectEncodingOptions & {
            withFileTypes: true;
            recursive?: boolean | undefined;
        }
    ): Dirent[];
    /**
     * Closes the file descriptor. No arguments other than a possible exception are
     * given to the completion callback.
     *
     * Calling `fs.close()` on any file descriptor (`fd`) that is currently in use
     * through any other `fs` operation may lead to undefined behavior.
     *
     * See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail.
     * @since v0.0.2
     */
    export function close(fd: number, callback?: NoParamCallback): void;
    export namespace close {
        /**
         * Asynchronous close(2) - close a file descriptor.
         * @param fd A file descriptor.
         */
        function __promisify__(fd: number): Promise<void>;
    }
    /**
     * Closes the file descriptor. Returns `undefined`.
     *
     * Calling `fs.closeSync()` on any file descriptor (`fd`) that is currently in use
     * through any other `fs` operation may lead to undefined behavior.
     *
     * See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail.
     * @since v0.1.21
     */
    export function closeSync(fd: number): void;
    /**
     * Asynchronous file open. See the POSIX [`open(2)`](http://man7.org/linux/man-pages/man2/open.2.html) documentation for more details.
     *
     * `mode` sets the file mode (permission and sticky bits), but only if the file was
     * created. On Windows, only the write permission can be manipulated; see {@link chmod}.
     *
     * The callback gets two arguments `(err, fd)`.
     *
     * Some characters (`< > : " / \ | ? *`) are reserved under Windows as documented
     * by [Naming Files, Paths, and Namespaces](https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file). Under NTFS, if the filename contains
     * a colon, Node.js will open a file system stream, as described by [this MSDN page](https://docs.microsoft.com/en-us/windows/desktop/FileIO/using-streams).
     *
     * Functions based on `fs.open()` exhibit this behavior as well:`fs.writeFile()`, `fs.readFile()`, etc.
     * @since v0.0.2
     * @param [flags='r'] See `support of file system `flags``.
     * @param [mode=0o666]
     */
    export function open(path: PathLike, flags: OpenMode | undefined, mode: Mode | undefined | null, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void;
    /**
     * Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * @param [flags='r'] See `support of file system `flags``.
     */
    export function open(path: PathLike, flags: OpenMode | undefined, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void;
    /**
     * Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    export function open(path: PathLike, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void;

    export namespace open {
        /**
         * Asynchronous open(2) - open and possibly create a file.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param mode A file mode. If a string is passed, it is parsed as an octal integer. If not supplied, defaults to `0o666`.
         */
        function __promisify__(path: PathLike, flags: OpenMode, mode?: Mode | null): Promise<number>;
    }
    /**
     * Returns an integer representing the file descriptor.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link open}.
     * @since v0.1.21
     * @param [flags='r']
     * @param [mode=0o666]
     */
    export function openSync(path: PathLike, flags: OpenMode, mode?: Mode | null): number;
    /**
     * Change the file system timestamps of the object referenced by `path`.
     *
     * The `atime` and `mtime` arguments follow these rules:
     *
     * * Values can be either numbers representing Unix epoch time in seconds,`Date`s, or a numeric string like `'123456789.0'`.
     * * If the value can not be converted to a number, or is `NaN`, `Infinity` or`-Infinity`, an `Error` will be thrown.
     * @since v0.4.2
     */
    export function utimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
    export namespace utimes {
        /**
         * Asynchronously change file timestamps of the file referenced by the supplied path.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * @param atime The last access time. If a string is provided, it will be coerced to number.
         * @param mtime The last modified time. If a string is provided, it will be coerced to number.
         */
        function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
    }
    /**
     * Returns `undefined`.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link utimes}.
     * @since v0.4.2
     */
    export function utimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void;
    /**
     * Change the file system timestamps of the object referenced by the supplied file
     * descriptor. See {@link utimes}.
     * @since v0.4.2
     */
    export function futimes(fd: number, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
    export namespace futimes {
        /**
         * Asynchronously change file timestamps of the file referenced by the supplied file descriptor.
         * @param fd A file descriptor.
         * @param atime The last access time. If a string is provided, it will be coerced to number.
         * @param mtime The last modified time. If a string is provided, it will be coerced to number.
         */
        function __promisify__(fd: number, atime: TimeLike, mtime: TimeLike): Promise<void>;
    }
    /**
     * Synchronous version of {@link futimes}. Returns `undefined`.
     * @since v0.4.2
     */
    export function futimesSync(fd: number, atime: TimeLike, mtime: TimeLike): void;
    /**
     * Request that all data for the open file descriptor is flushed to the storage
     * device. The specific implementation is operating system and device specific.
     * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. No arguments other
     * than a possible exception are given to the completion callback.
     * @since v0.1.96
     */
    export function fsync(fd: number, callback: NoParamCallback): void;
    export namespace fsync {
        /**
         * Asynchronous fsync(2) - synchronize a file's in-core state with the underlying storage device.
         * @param fd A file descriptor.
         */
        function __promisify__(fd: number): Promise<void>;
    }
    /**
     * Request that all data for the open file descriptor is flushed to the storage
     * device. The specific implementation is operating system and device specific.
     * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. Returns `undefined`.
     * @since v0.1.96
     */
    export function fsyncSync(fd: number): void;
    /**
     * Write `buffer` to the file specified by `fd`.
     *
     * `offset` determines the part of the buffer to be written, and `length` is
     * an integer specifying the number of bytes to write.
     *
     * `position` refers to the offset from the beginning of the file where this data
     * should be written. If `typeof position !== 'number'`, the data will be written
     * at the current position. See [`pwrite(2)`](http://man7.org/linux/man-pages/man2/pwrite.2.html).
     *
     * The callback will be given three arguments `(err, bytesWritten, buffer)` where`bytesWritten` specifies how many _bytes_ were written from `buffer`.
     *
     * If this method is invoked as its `util.promisify()` ed version, it returns
     * a promise for an `Object` with `bytesWritten` and `buffer` properties.
     *
     * It is unsafe to use `fs.write()` multiple times on the same file without waiting
     * for the callback. For this scenario, {@link createWriteStream} is
     * recommended.
     *
     * On Linux, positional writes don't work when the file is opened in append mode.
     * The kernel ignores the position argument and always appends the data to
     * the end of the file.
     * @since v0.0.2
     */
    export function write<TBuffer extends NodeJS.ArrayBufferView>(
        fd: number,
        buffer: TBuffer,
        offset: number | undefined | null,
        length: number | undefined | null,
        position: number | undefined | null,
        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void
    ): void;
    /**
     * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
     * @param fd A file descriptor.
     * @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
     * @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
     */
    export function write<TBuffer extends NodeJS.ArrayBufferView>(
        fd: number,
        buffer: TBuffer,
        offset: number | undefined | null,
        length: number | undefined | null,
        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void
    ): void;
    /**
     * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
     * @param fd A file descriptor.
     * @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
     */
    export function write<TBuffer extends NodeJS.ArrayBufferView>(
        fd: number,
        buffer: TBuffer,
        offset: number | undefined | null,
        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void
    ): void;
    /**
     * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
     * @param fd A file descriptor.
     */
    export function write<TBuffer extends NodeJS.ArrayBufferView>(fd: number, buffer: TBuffer, callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void): void;
    /**
     * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
     * @param fd A file descriptor.
     * @param string A string to write.
     * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
     * @param encoding The expected string encoding.
     */
    export function write(
        fd: number,
        string: string,
        position: number | undefined | null,
        encoding: BufferEncoding | undefined | null,
        callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void
    ): void;
    /**
     * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
     * @param fd A file descriptor.
     * @param string A string to write.
     * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
     */
    export function write(fd: number, string: string, position: number | undefined | null, callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void): void;
    /**
     * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
     * @param fd A file descriptor.
     * @param string A string to write.
     */
    export function write(fd: number, string: string, callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void): void;
    export namespace write {
        /**
         * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
         * @param fd A file descriptor.
         * @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
         * @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
         * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
         */
        function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
            fd: number,
            buffer?: TBuffer,
            offset?: number,
            length?: number,
            position?: number | null
        ): Promise<{
            bytesWritten: number;
            buffer: TBuffer;
        }>;
        /**
         * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
         * @param fd A file descriptor.
         * @param string A string to write.
         * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
         * @param encoding The expected string encoding.
         */
        function __promisify__(
            fd: number,
            string: string,
            position?: number | null,
            encoding?: BufferEncoding | null
        ): Promise<{
            bytesWritten: number;
            buffer: string;
        }>;
    }
    /**
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link write}.
     * @since v0.1.21
     * @return The number of bytes written.
     */
    export function writeSync(fd: number, buffer: NodeJS.ArrayBufferView, offset?: number | null, length?: number | null, position?: number | null): number;
    /**
     * Synchronously writes `string` to the file referenced by the supplied file descriptor, returning the number of bytes written.
     * @param fd A file descriptor.
     * @param string A string to write.
     * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
     * @param encoding The expected string encoding.
     */
    export function writeSync(fd: number, string: string, position?: number | null, encoding?: BufferEncoding | null): number;
    export type ReadPosition = number | bigint;
    export interface ReadSyncOptions {
        /**
         * @default 0
         */
        offset?: number | undefined;
        /**
         * @default `length of buffer`
         */
        length?: number | undefined;
        /**
         * @default null
         */
        position?: ReadPosition | null | undefined;
    }
    export interface ReadAsyncOptions<TBuffer extends NodeJS.ArrayBufferView> extends ReadSyncOptions {
        buffer?: TBuffer;
    }
    /**
     * Read data from the file specified by `fd`.
     *
     * The callback is given the three arguments, `(err, bytesRead, buffer)`.
     *
     * If the file is not modified concurrently, the end-of-file is reached when the
     * number of bytes read is zero.
     *
     * If this method is invoked as its `util.promisify()` ed version, it returns
     * a promise for an `Object` with `bytesRead` and `buffer` properties.
     * @since v0.0.2
     * @param buffer The buffer that the data will be written to.
     * @param offset The position in `buffer` to write the data to.
     * @param length The number of bytes to read.
     * @param position Specifies where to begin reading from in the file. If `position` is `null` or `-1 `, data will be read from the current file position, and the file position will be updated. If
     * `position` is an integer, the file position will be unchanged.
     */
    export function read<TBuffer extends NodeJS.ArrayBufferView>(
        fd: number,
        buffer: TBuffer,
        offset: number,
        length: number,
        position: ReadPosition | null,
        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void
    ): void;
    /**
     * Similar to the above `fs.read` function, this version takes an optional `options` object.
     * If not otherwise specified in an `options` object,
     * `buffer` defaults to `Buffer.alloc(16384)`,
     * `offset` defaults to `0`,
     * `length` defaults to `buffer.byteLength`, `- offset` as of Node 17.6.0
     * `position` defaults to `null`
     * @since v12.17.0, 13.11.0
     */
    export function read<TBuffer extends NodeJS.ArrayBufferView>(
        fd: number,
        options: ReadAsyncOptions<TBuffer>,
        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void
    ): void;
    export function read(fd: number, callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: NodeJS.ArrayBufferView) => void): void;
    export namespace read {
        /**
         * @param fd A file descriptor.
         * @param buffer The buffer that the data will be written to.
         * @param offset The offset in the buffer at which to start writing.
         * @param length The number of bytes to read.
         * @param position The offset from the beginning of the file from which data should be read. If `null`, data will be read from the current position.
         */
        function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
            fd: number,
            buffer: TBuffer,
            offset: number,
            length: number,
            position: number | null
        ): Promise<{
            bytesRead: number;
            buffer: TBuffer;
        }>;
        function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
            fd: number,
            options: ReadAsyncOptions<TBuffer>
        ): Promise<{
            bytesRead: number;
            buffer: TBuffer;
        }>;
        function __promisify__(fd: number): Promise<{
            bytesRead: number;
            buffer: NodeJS.ArrayBufferView;
        }>;
    }
    /**
     * Returns the number of `bytesRead`.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link read}.
     * @since v0.1.21
     */
    export function readSync(fd: number, buffer: NodeJS.ArrayBufferView, offset: number, length: number, position: ReadPosition | null): number;
    /**
     * Similar to the above `fs.readSync` function, this version takes an optional `options` object.
     * If no `options` object is specified, it will default with the above values.
     */
    export function readSync(fd: number, buffer: NodeJS.ArrayBufferView, opts?: ReadSyncOptions): number;
    /**
     * Asynchronously reads the entire contents of a file.
     *
     * ```js
     * import { readFile } from 'fs';
     *
     * readFile('/etc/passwd', (err, data) => {
     *   if (err) throw err;
     *   console.log(data);
     * });
     * ```
     *
     * The callback is passed two arguments `(err, data)`, where `data` is the
     * contents of the file.
     *
     * If no encoding is specified, then the raw buffer is returned.
     *
     * If `options` is a string, then it specifies the encoding:
     *
     * ```js
     * import { readFile } from 'fs';
     *
     * readFile('/etc/passwd', 'utf8', callback);
     * ```
     *
     * When the path is a directory, the behavior of `fs.readFile()` and {@link readFileSync} is platform-specific. On macOS, Linux, and Windows, an
     * error will be returned. On FreeBSD, a representation of the directory's contents
     * will be returned.
     *
     * ```js
     * import { readFile } from 'fs';
     *
     * // macOS, Linux, and Windows
     * readFile('<directory>', (err, data) => {
     *   // => [Error: EISDIR: illegal operation on a directory, read <directory>]
     * });
     *
     * //  FreeBSD
     * readFile('<directory>', (err, data) => {
     *   // => null, <data>
     * });
     * ```
     *
     * It is possible to abort an ongoing request using an `AbortSignal`. If a
     * request is aborted the callback is called with an `AbortError`:
     *
     * ```js
     * import { readFile } from 'fs';
     *
     * const controller = new AbortController();
     * const signal = controller.signal;
     * readFile(fileInfo[0].name, { signal }, (err, buf) => {
     *   // ...
     * });
     * // When you want to abort the request
     * controller.abort();
     * ```
     *
     * The `fs.readFile()` function buffers the entire file. To minimize memory costs,
     * when possible prefer streaming via `fs.createReadStream()`.
     *
     * Aborting an ongoing request does not abort individual operating
     * system requests but rather the internal buffering `fs.readFile` performs.
     * @since v0.1.29
     * @param path filename or file descriptor
     */
    export function readFile(
        path: PathOrFileDescriptor,
        options:
            | ({
                  encoding?: null | undefined;
                  flag?: string | undefined;
              } & Abortable)
            | undefined
            | null,
        callback: (err: NodeJS.ErrnoException | null, data: Buffer) => void
    ): void;
    /**
     * Asynchronously reads the entire contents of a file.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
     * If a flag is not provided, it defaults to `'r'`.
     */
    export function readFile(
        path: PathOrFileDescriptor,
        options:
            | ({
                  encoding: BufferEncoding;
                  flag?: string | undefined;
              } & Abortable)
            | BufferEncoding,
        callback: (err: NodeJS.ErrnoException | null, data: string) => void
    ): void;
    /**
     * Asynchronously reads the entire contents of a file.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
     * If a flag is not provided, it defaults to `'r'`.
     */
    export function readFile(
        path: PathOrFileDescriptor,
        options:
            | (ObjectEncodingOptions & {
                  flag?: string | undefined;
              } & Abortable)
            | BufferEncoding
            | undefined
            | null,
        callback: (err: NodeJS.ErrnoException | null, data: string | Buffer) => void
    ): void;
    /**
     * Asynchronously reads the entire contents of a file.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
     */
    export function readFile(path: PathOrFileDescriptor, callback: (err: NodeJS.ErrnoException | null, data: Buffer) => void): void;
    export namespace readFile {
        /**
         * Asynchronously reads the entire contents of a file.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
         * @param options An object that may contain an optional flag.
         * If a flag is not provided, it defaults to `'r'`.
         */
        function __promisify__(
            path: PathOrFileDescriptor,
            options?: {
                encoding?: null | undefined;
                flag?: string | undefined;
            } | null
        ): Promise<Buffer>;
        /**
         * Asynchronously reads the entire contents of a file.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
         * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
         * If a flag is not provided, it defaults to `'r'`.
         */
        function __promisify__(
            path: PathOrFileDescriptor,
            options:
                | {
                      encoding: BufferEncoding;
                      flag?: string | undefined;
                  }
                | BufferEncoding
        ): Promise<string>;
        /**
         * Asynchronously reads the entire contents of a file.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
         * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
         * If a flag is not provided, it defaults to `'r'`.
         */
        function __promisify__(
            path: PathOrFileDescriptor,
            options?:
                | (ObjectEncodingOptions & {
                      flag?: string | undefined;
                  })
                | BufferEncoding
                | null
        ): Promise<string | Buffer>;
    }
    /**
     * Returns the contents of the `path`.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link readFile}.
     *
     * If the `encoding` option is specified then this function returns a
     * string. Otherwise it returns a buffer.
     *
     * Similar to {@link readFile}, when the path is a directory, the behavior of`fs.readFileSync()` is platform-specific.
     *
     * ```js
     * import { readFileSync } from 'fs';
     *
     * // macOS, Linux, and Windows
     * readFileSync('<directory>');
     * // => [Error: EISDIR: illegal operation on a directory, read <directory>]
     *
     * //  FreeBSD
     * readFileSync('<directory>'); // => <data>
     * ```
     * @since v0.1.8
     * @param path filename or file descriptor
     */
    export function readFileSync(
        path: PathOrFileDescriptor,
        options?: {
            encoding?: null | undefined;
            flag?: string | undefined;
        } | null
    ): Buffer;
    /**
     * Synchronously reads the entire contents of a file.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
     * If a flag is not provided, it defaults to `'r'`.
     */
    export function readFileSync(
        path: PathOrFileDescriptor,
        options:
            | {
                  encoding: BufferEncoding;
                  flag?: string | undefined;
              }
            | BufferEncoding
    ): string;
    /**
     * Synchronously reads the entire contents of a file.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
     * If a flag is not provided, it defaults to `'r'`.
     */
    export function readFileSync(
        path: PathOrFileDescriptor,
        options?:
            | (ObjectEncodingOptions & {
                  flag?: string | undefined;
              })
            | BufferEncoding
            | null
    ): string | Buffer;
    export type WriteFileOptions =
        | (ObjectEncodingOptions &
              Abortable & {
                  mode?: Mode | undefined;
                  flag?: string | undefined;
              })
        | BufferEncoding
        | null;
    /**
     * When `file` is a filename, asynchronously writes data to the file, replacing the
     * file if it already exists. `data` can be a string or a buffer.
     *
     * When `file` is a file descriptor, the behavior is similar to calling`fs.write()` directly (which is recommended). See the notes below on using
     * a file descriptor.
     *
     * The `encoding` option is ignored if `data` is a buffer.
     *
     * The `mode` option only affects the newly created file. See {@link open} for more details.
     *
     * ```js
     * import { writeFile } from 'fs';
     * import { Buffer } from 'buffer';
     *
     * const data = new Uint8Array(Buffer.from('Hello Node.js'));
     * writeFile('message.txt', data, (err) => {
     *   if (err) throw err;
     *   console.log('The file has been saved!');
     * });
     * ```
     *
     * If `options` is a string, then it specifies the encoding:
     *
     * ```js
     * import { writeFile } from 'fs';
     *
     * writeFile('message.txt', 'Hello Node.js', 'utf8', callback);
     * ```
     *
     * It is unsafe to use `fs.writeFile()` multiple times on the same file without
     * waiting for the callback. For this scenario, {@link createWriteStream} is
     * recommended.
     *
     * Similarly to `fs.readFile` \- `fs.writeFile` is a convenience method that
     * performs multiple `write` calls internally to write the buffer passed to it.
     * For performance sensitive code consider using {@link createWriteStream}.
     *
     * It is possible to use an `AbortSignal` to cancel an `fs.writeFile()`.
     * Cancelation is "best effort", and some amount of data is likely still
     * to be written.
     *
     * ```js
     * import { writeFile } from 'fs';
     * import { Buffer } from 'buffer';
     *
     * const controller = new AbortController();
     * const { signal } = controller;
     * const data = new Uint8Array(Buffer.from('Hello Node.js'));
     * writeFile('message.txt', data, { signal }, (err) => {
     *   // When a request is aborted - the callback is called with an AbortError
     * });
     * // When the request should be aborted
     * controller.abort();
     * ```
     *
     * Aborting an ongoing request does not abort individual operating
     * system requests but rather the internal buffering `fs.writeFile` performs.
     * @since v0.1.29
     * @param file filename or file descriptor
     */
    export function writeFile(file: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, options: WriteFileOptions, callback: NoParamCallback): void;
    /**
     * Asynchronously writes data to a file, replacing the file if it already exists.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
     * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
     */
    export function writeFile(path: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, callback: NoParamCallback): void;
    export namespace writeFile {
        /**
         * Asynchronously writes data to a file, replacing the file if it already exists.
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
         * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
         * @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag.
         * If `encoding` is not supplied, the default of `'utf8'` is used.
         * If `mode` is not supplied, the default of `0o666` is used.
         * If `mode` is a string, it is parsed as an octal integer.
         * If `flag` is not supplied, the default of `'w'` is used.
         */
        function __promisify__(path: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, options?: WriteFileOptions): Promise<void>;
    }
    /**
     * Returns `undefined`.
     *
     * The `mode` option only affects the newly created file. See {@link open} for more details.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link writeFile}.
     * @since v0.1.29
     * @param file filename or file descriptor
     */
    export function writeFileSync(file: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, options?: WriteFileOptions): void;
    /**
     * Asynchronously append data to a file, creating the file if it does not yet
     * exist. `data` can be a string or a `Buffer`.
     *
     * The `mode` option only affects the newly created file. See {@link open} for more details.
     *
     * ```js
     * import { appendFile } from 'fs';
     *
     * appendFile('message.txt', 'data to append', (err) => {
     *   if (err) throw err;
     *   console.log('The "data to append" was appended to file!');
     * });
     * ```
     *
     * If `options` is a string, then it specifies the encoding:
     *
     * ```js
     * import { appendFile } from 'fs';
     *
     * appendFile('message.txt', 'data to append', 'utf8', callback);
     * ```
     *
     * The `path` may be specified as a numeric file descriptor that has been opened
     * for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will
     * not be closed automatically.
     *
     * ```js
     * import { open, close, appendFile } from 'fs';
     *
     * function closeFd(fd) {
     *   close(fd, (err) => {
     *     if (err) throw err;
     *   });
     * }
     *
     * open('message.txt', 'a', (err, fd) => {
     *   if (err) throw err;
     *
     *   try {
     *     appendFile(fd, 'data to append', 'utf8', (err) => {
     *       closeFd(fd);
     *       if (err) throw err;
     *     });
     *   } catch (err) {
     *     closeFd(fd);
     *     throw err;
     *   }
     * });
     * ```
     * @since v0.6.7
     * @param path filename or file descriptor
     */
    export function appendFile(path: PathOrFileDescriptor, data: string | Uint8Array, options: WriteFileOptions, callback: NoParamCallback): void;
    /**
     * Asynchronously append data to a file, creating the file if it does not exist.
     * @param file A path to a file. If a URL is provided, it must use the `file:` protocol.
     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
     * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
     */
    export function appendFile(file: PathOrFileDescriptor, data: string | Uint8Array, callback: NoParamCallback): void;
    export namespace appendFile {
        /**
         * Asynchronously append data to a file, creating the file if it does not exist.
         * @param file A path to a file. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
         * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
         * @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag.
         * If `encoding` is not supplied, the default of `'utf8'` is used.
         * If `mode` is not supplied, the default of `0o666` is used.
         * If `mode` is a string, it is parsed as an octal integer.
         * If `flag` is not supplied, the default of `'a'` is used.
         */
        function __promisify__(file: PathOrFileDescriptor, data: string | Uint8Array, options?: WriteFileOptions): Promise<void>;
    }
    /**
     * Synchronously append data to a file, creating the file if it does not yet
     * exist. `data` can be a string or a `Buffer`.
     *
     * The `mode` option only affects the newly created file. See {@link open} for more details.
     *
     * ```js
     * import { appendFileSync } from 'fs';
     *
     * try {
     *   appendFileSync('message.txt', 'data to append');
     *   console.log('The "data to append" was appended to file!');
     * } catch (err) {
     *   // Handle the error
     * }
     * ```
     *
     * If `options` is a string, then it specifies the encoding:
     *
     * ```js
     * import { appendFileSync } from 'fs';
     *
     * appendFileSync('message.txt', 'data to append', 'utf8');
     * ```
     *
     * The `path` may be specified as a numeric file descriptor that has been opened
     * for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will
     * not be closed automatically.
     *
     * ```js
     * import { openSync, closeSync, appendFileSync } from 'fs';
     *
     * let fd;
     *
     * try {
     *   fd = openSync('message.txt', 'a');
     *   appendFileSync(fd, 'data to append', 'utf8');
     * } catch (err) {
     *   // Handle the error
     * } finally {
     *   if (fd !== undefined)
     *     closeSync(fd);
     * }
     * ```
     * @since v0.6.7
     * @param path filename or file descriptor
     */
    export function appendFileSync(path: PathOrFileDescriptor, data: string | Uint8Array, options?: WriteFileOptions): void;
    /**
     * Watch for changes on `filename`. The callback `listener` will be called each
     * time the file is accessed.
     *
     * The `options` argument may be omitted. If provided, it should be an object. The`options` object may contain a boolean named `persistent` that indicates
     * whether the process should continue to run as long as files are being watched.
     * The `options` object may specify an `interval` property indicating how often the
     * target should be polled in milliseconds.
     *
     * The `listener` gets two arguments the current stat object and the previous
     * stat object:
     *
     * ```js
     * import { watchFile } from 'fs';
     *
     * watchFile('message.text', (curr, prev) => {
     *   console.log(`the current mtime is: ${curr.mtime}`);
     *   console.log(`the previous mtime was: ${prev.mtime}`);
     * });
     * ```
     *
     * These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`,
     * the numeric values in these objects are specified as `BigInt`s.
     *
     * To be notified when the file was modified, not just accessed, it is necessary
     * to compare `curr.mtimeMs` and `prev.mtimeMs`.
     *
     * When an `fs.watchFile` operation results in an `ENOENT` error, it
     * will invoke the listener once, with all the fields zeroed (or, for dates, the
     * Unix Epoch). If the file is created later on, the listener will be called
     * again, with the latest stat objects. This is a change in functionality since
     * v0.10.
     *
     * Using {@link watch} is more efficient than `fs.watchFile` and`fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and`fs.unwatchFile` when possible.
     *
     * When a file being watched by `fs.watchFile()` disappears and reappears,
     * then the contents of `previous` in the second callback event (the file's
     * reappearance) will be the same as the contents of `previous` in the first
     * callback event (its disappearance).
     *
     * This happens when:
     *
     * * the file is deleted, followed by a restore
     * * the file is renamed and then renamed a second time back to its original name
     * @since v0.1.31
     */
    export interface WatchFileOptions {
        bigint?: boolean | undefined;
        persistent?: boolean | undefined;
        interval?: number | undefined;
    }
    /**
     * Watch for changes on `filename`. The callback `listener` will be called each
     * time the file is accessed.
     *
     * The `options` argument may be omitted. If provided, it should be an object. The`options` object may contain a boolean named `persistent` that indicates
     * whether the process should continue to run as long as files are being watched.
     * The `options` object may specify an `interval` property indicating how often the
     * target should be polled in milliseconds.
     *
     * The `listener` gets two arguments the current stat object and the previous
     * stat object:
     *
     * ```js
     * import { watchFile } from 'fs';
     *
     * watchFile('message.text', (curr, prev) => {
     *   console.log(`the current mtime is: ${curr.mtime}`);
     *   console.log(`the previous mtime was: ${prev.mtime}`);
     * });
     * ```
     *
     * These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`,
     * the numeric values in these objects are specified as `BigInt`s.
     *
     * To be notified when the file was modified, not just accessed, it is necessary
     * to compare `curr.mtimeMs` and `prev.mtimeMs`.
     *
     * When an `fs.watchFile` operation results in an `ENOENT` error, it
     * will invoke the listener once, with all the fields zeroed (or, for dates, the
     * Unix Epoch). If the file is created later on, the listener will be called
     * again, with the latest stat objects. This is a change in functionality since
     * v0.10.
     *
     * Using {@link watch} is more efficient than `fs.watchFile` and`fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and`fs.unwatchFile` when possible.
     *
     * When a file being watched by `fs.watchFile()` disappears and reappears,
     * then the contents of `previous` in the second callback event (the file's
     * reappearance) will be the same as the contents of `previous` in the first
     * callback event (its disappearance).
     *
     * This happens when:
     *
     * * the file is deleted, followed by a restore
     * * the file is renamed and then renamed a second time back to its original name
     * @since v0.1.31
     */
    export function watchFile(
        filename: PathLike,
        options:
            | (WatchFileOptions & {
                  bigint?: false | undefined;
              })
            | undefined,
        listener: StatsListener
    ): StatWatcher;
    export function watchFile(
        filename: PathLike,
        options:
            | (WatchFileOptions & {
                  bigint: true;
              })
            | undefined,
        listener: BigIntStatsListener
    ): StatWatcher;
    /**
     * Watch for changes on `filename`. The callback `listener` will be called each time the file is accessed.
     * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
     * @param listener The callback listener will be called each time the file is accessed.
     */
    export function watchFile(filename: PathLike, listener: StatsListener): StatWatcher;
    /**
     * Stop watching for changes on `filename`. If `listener` is specified, only that
     * particular listener is removed. Otherwise, _all_ listeners are removed,
     * effectively stopping watching of `filename`.
     *
     * Calling `fs.unwatchFile()` with a filename that is not being watched is a
     * no-op, not an error.
     *
     * Using {@link watch} is more efficient than `fs.watchFile()` and`fs.unwatchFile()`. `fs.watch()` should be used instead of `fs.watchFile()`and `fs.unwatchFile()` when possible.
     * @since v0.1.31
     * @param listener Optional, a listener previously attached using `fs.watchFile()`
     */
    export function unwatchFile(filename: PathLike, listener?: StatsListener): void;
    export function unwatchFile(filename: PathLike, listener?: BigIntStatsListener): void;
    export interface WatchOptions extends Abortable {
        encoding?: BufferEncoding | 'buffer' | undefined;
        persistent?: boolean | undefined;
        recursive?: boolean | undefined;
    }
    export type WatchEventType = 'rename' | 'change';
    export type WatchListener<T> = (event: WatchEventType, filename: T | null) => void;
    export type StatsListener = (curr: Stats, prev: Stats) => void;
    export type BigIntStatsListener = (curr: BigIntStats, prev: BigIntStats) => void;
    /**
     * Watch for changes on `filename`, where `filename` is either a file or a
     * directory.
     *
     * The second argument is optional. If `options` is provided as a string, it
     * specifies the `encoding`. Otherwise `options` should be passed as an object.
     *
     * The listener callback gets two arguments `(eventType, filename)`. `eventType`is either `'rename'` or `'change'`, and `filename` is the name of the file
     * which triggered the event.
     *
     * On most platforms, `'rename'` is emitted whenever a filename appears or
     * disappears in the directory.
     *
     * The listener callback is attached to the `'change'` event fired by `fs.FSWatcher`, but it is not the same thing as the `'change'` value of`eventType`.
     *
     * If a `signal` is passed, aborting the corresponding AbortController will close
     * the returned `fs.FSWatcher`.
     * @since v0.5.10
     * @param listener
     */
    export function watch(
        filename: PathLike,
        options:
            | (WatchOptions & {
                  encoding: 'buffer';
              })
            | 'buffer',
        listener?: WatchListener<Buffer>
    ): FSWatcher;
    /**
     * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
     * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
     * @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options.
     * If `encoding` is not supplied, the default of `'utf8'` is used.
     * If `persistent` is not supplied, the default of `true` is used.
     * If `recursive` is not supplied, the default of `false` is used.
     */
    export function watch(filename: PathLike, options?: WatchOptions | BufferEncoding | null, listener?: WatchListener<string>): FSWatcher;
    /**
     * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
     * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
     * @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options.
     * If `encoding` is not supplied, the default of `'utf8'` is used.
     * If `persistent` is not supplied, the default of `true` is used.
     * If `recursive` is not supplied, the default of `false` is used.
     */
    export function watch(filename: PathLike, options: WatchOptions | string, listener?: WatchListener<string | Buffer>): FSWatcher;
    /**
     * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
     * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
     */
    export function watch(filename: PathLike, listener?: WatchListener<string>): FSWatcher;
    /**
     * Test whether or not the given path exists by checking with the file system.
     * Then call the `callback` argument with either true or false:
     *
     * ```js
     * import { exists } from 'fs';
     *
     * exists('/etc/passwd', (e) => {
     *   console.log(e ? 'it exists' : 'no passwd!');
     * });
     * ```
     *
     * **The parameters for this callback are not consistent with other Node.js**
     * **callbacks.** Normally, the first parameter to a Node.js callback is an `err`parameter, optionally followed by other parameters. The `fs.exists()` callback
     * has only one boolean parameter. This is one reason `fs.access()` is recommended
     * instead of `fs.exists()`.
     *
     * Using `fs.exists()` to check for the existence of a file before calling`fs.open()`, `fs.readFile()` or `fs.writeFile()` is not recommended. Doing
     * so introduces a race condition, since other processes may change the file's
     * state between the two calls. Instead, user code should open/read/write the
     * file directly and handle the error raised if the file does not exist.
     *
     * **write (NOT RECOMMENDED)**
     *
     * ```js
     * import { exists, open, close } from 'fs';
     *
     * exists('myfile', (e) => {
     *   if (e) {
     *     console.error('myfile already exists');
     *   } else {
     *     open('myfile', 'wx', (err, fd) => {
     *       if (err) throw err;
     *
     *       try {
     *         writeMyData(fd);
     *       } finally {
     *         close(fd, (err) => {
     *           if (err) throw err;
     *         });
     *       }
     *     });
     *   }
     * });
     * ```
     *
     * **write (RECOMMENDED)**
     *
     * ```js
     * import { open, close } from 'fs';
     * open('myfile', 'wx', (err, fd) => {
     *   if (err) {
     *     if (err.code === 'EEXIST') {
     *       console.error('myfile already exists');
     *       return;
     *     }
     *
     *     throw err;
     *   }
     *
     *   try {
     *     writeMyData(fd);
     *   } finally {
     *     close(fd, (err) => {
     *       if (err) throw err;
     *     });
     *   }
     * });
     * ```
     *
     * **read (NOT RECOMMENDED)**
     *
     * ```js
     * import { open, close, exists } from 'fs';
     *
     * exists('myfile', (e) => {
     *   if (e) {
     *     open('myfile', 'r', (err, fd) => {
     *       if (err) throw err;
     *
     *       try {
     *         readMyData(fd);
     *       } finally {
     *         close(fd, (err) => {
     *           if (err) throw err;
     *         });
     *       }
     *     });
     *   } else {
     *     console.error('myfile does not exist');
     *   }
     * });
     * ```
     *
     * **read (RECOMMENDED)**
     *
     * ```js
     * import { open, close } from 'fs';
     *
     * open('myfile', 'r', (err, fd) => {
     *   if (err) {
     *     if (err.code === 'ENOENT') {
     *       console.error('myfile does not exist');
     *       return;
     *     }
     *
     *     throw err;
     *   }
     *
     *   try {
     *     readMyData(fd);
     *   } finally {
     *     close(fd, (err) => {
     *       if (err) throw err;
     *     });
     *   }
     * });
     * ```
     *
     * The "not recommended" examples above check for existence and then use the
     * file; the "recommended" examples are better because they use the file directly
     * and handle the error, if any.
     *
     * In general, check for the existence of a file only if the file won’t be
     * used directly, for example when its existence is a signal from another
     * process.
     * @since v0.0.2
     * @deprecated Since v1.0.0 - Use {@link stat} or {@link access} instead.
     */
    export function exists(path: PathLike, callback: (exists: boolean) => void): void;
    /** @deprecated */
    export namespace exists {
        /**
         * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         */
        function __promisify__(path: PathLike): Promise<boolean>;
    }
    /**
     * Returns `true` if the path exists, `false` otherwise.
     *
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link exists}.
     *
     * `fs.exists()` is deprecated, but `fs.existsSync()` is not. The `callback`parameter to `fs.exists()` accepts parameters that are inconsistent with other
     * Node.js callbacks. `fs.existsSync()` does not use a callback.
     *
     * ```js
     * import { existsSync } from 'fs';
     *
     * if (existsSync('/etc/passwd'))
     *   console.log('The path exists.');
     * ```
     * @since v0.1.21
     */
    export function existsSync(path: PathLike): boolean;
    export namespace constants {
        // File Access Constants
        /** Constant for fs.access(). File is visible to the calling process. */
        const F_OK: number;
        /** Constant for fs.access(). File can be read by the calling process. */
        const R_OK: number;
        /** Constant for fs.access(). File can be written by the calling process. */
        const W_OK: number;
        /** Constant for fs.access(). File can be executed by the calling process. */
        const X_OK: number;
        // File Copy Constants
        /** Constant for fs.copyFile. Flag indicating the destination file should not be overwritten if it already exists. */
        const COPYFILE_EXCL: number;
        /**
         * Constant for fs.copyFile. copy operation will attempt to create a copy-on-write reflink.
         * If the underlying platform does not support copy-on-write, then a fallback copy mechanism is used.
         */
        const COPYFILE_FICLONE: number;
        /**
         * Constant for fs.copyFile. Copy operation will attempt to create a copy-on-write reflink.
         * If the underlying platform does not support copy-on-write, then the operation will fail with an error.
         */
        const COPYFILE_FICLONE_FORCE: number;
        // File Open Constants
        /** Constant for fs.open(). Flag indicating to open a file for read-only access. */
        const O_RDONLY: number;
        /** Constant for fs.open(). Flag indicating to open a file for write-only access. */
        const O_WRONLY: number;
        /** Constant for fs.open(). Flag indicating to open a file for read-write access. */
        const O_RDWR: number;
        /** Constant for fs.open(). Flag indicating to create the file if it does not already exist. */
        const O_CREAT: number;
        /** Constant for fs.open(). Flag indicating that opening a file should fail if the O_CREAT flag is set and the file already exists. */
        const O_EXCL: number;
        /**
         * Constant for fs.open(). Flag indicating that if path identifies a terminal device,
         * opening the path shall not cause that terminal to become the controlling terminal for the process
         * (if the process does not already have one).
         */
        const O_NOCTTY: number;
        /** Constant for fs.open(). Flag indicating that if the file exists and is a regular file, and the file is opened successfully for write access, its length shall be truncated to zero. */
        const O_TRUNC: number;
        /** Constant for fs.open(). Flag indicating that data will be appended to the end of the file. */
        const O_APPEND: number;
        /** Constant for fs.open(). Flag indicating that the open should fail if the path is not a directory. */
        const O_DIRECTORY: number;
        /**
         * constant for fs.open().
         * Flag indicating reading accesses to the file system will no longer result in
         * an update to the atime information associated with the file.
         * This flag is available on Linux operating systems only.
         */
        const O_NOATIME: number;
        /** Constant for fs.open(). Flag indicating that the open should fail if the path is a symbolic link. */
        const O_NOFOLLOW: number;
        /** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O. */
        const O_SYNC: number;
        /** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O with write operations waiting for data integrity. */
        const O_DSYNC: number;
        /** Constant for fs.open(). Flag indicating to open the symbolic link itself rather than the resource it is pointing to. */
        const O_SYMLINK: number;
        /** Constant for fs.open(). When set, an attempt will be made to minimize caching effects of file I/O. */
        const O_DIRECT: number;
        /** Constant for fs.open(). Flag indicating to open the file in nonblocking mode when possible. */
        const O_NONBLOCK: number;
        // File Type Constants
        /** Constant for fs.Stats mode property for determining a file's type. Bit mask used to extract the file type code. */
        const S_IFMT: number;
        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a regular file. */
        const S_IFREG: number;
        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a directory. */
        const S_IFDIR: number;
        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a character-oriented device file. */
        const S_IFCHR: number;
        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a block-oriented device file. */
        const S_IFBLK: number;
        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a FIFO/pipe. */
        const S_IFIFO: number;
        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a symbolic link. */
        const S_IFLNK: number;
        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a socket. */
        const S_IFSOCK: number;
        // File Mode Constants
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by owner. */
        const S_IRWXU: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by owner. */
        const S_IRUSR: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by owner. */
        const S_IWUSR: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by owner. */
        const S_IXUSR: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by group. */
        const S_IRWXG: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by group. */
        const S_IRGRP: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by group. */
        const S_IWGRP: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by group. */
        const S_IXGRP: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by others. */
        const S_IRWXO: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by others. */
        const S_IROTH: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by others. */
        const S_IWOTH: number;
        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by others. */
        const S_IXOTH: number;
        /**
         * When set, a memory file mapping is used to access the file. This flag
         * is available on Windows operating systems only. On other operating systems,
         * this flag is ignored.
         */
        const UV_FS_O_FILEMAP: number;
    }
    /**
     * Tests a user's permissions for the file or directory specified by `path`.
     * The `mode` argument is an optional integer that specifies the accessibility
     * checks to be performed. `mode` should be either the value `fs.constants.F_OK`or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`,`fs.constants.W_OK`, and `fs.constants.X_OK`
     * (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
     * possible values of `mode`.
     *
     * The final argument, `callback`, is a callback function that is invoked with
     * a possible error argument. If any of the accessibility checks fail, the error
     * argument will be an `Error` object. The following examples check if`package.json` exists, and if it is readable or writable.
     *
     * ```js
     * import { access, constants } from 'fs';
     *
     * const file = 'package.json';
     *
     * // Check if the file exists in the current directory.
     * access(file, constants.F_OK, (err) => {
     *   console.log(`${file} ${err ? 'does not exist' : 'exists'}`);
     * });
     *
     * // Check if the file is readable.
     * access(file, constants.R_OK, (err) => {
     *   console.log(`${file} ${err ? 'is not readable' : 'is readable'}`);
     * });
     *
     * // Check if the file is writable.
     * access(file, constants.W_OK, (err) => {
     *   console.log(`${file} ${err ? 'is not writable' : 'is writable'}`);
     * });
     *
     * // Check if the file is readable and writable.
     * access(file, constants.R_OK | constants.W_OK, (err) => {
     *   console.log(`${file} ${err ? 'is not' : 'is'} readable and writable`);
     * });
     * ```
     *
     * Do not use `fs.access()` to check for the accessibility of a file before calling`fs.open()`, `fs.readFile()` or `fs.writeFile()`. Doing
     * so introduces a race condition, since other processes may change the file's
     * state between the two calls. Instead, user code should open/read/write the
     * file directly and handle the error raised if the file is not accessible.
     *
     * **write (NOT RECOMMENDED)**
     *
     * ```js
     * import { access, open, close } from 'fs';
     *
     * access('myfile', (err) => {
     *   if (!err) {
     *     console.error('myfile already exists');
     *     return;
     *   }
     *
     *   open('myfile', 'wx', (err, fd) => {
     *     if (err) throw err;
     *
     *     try {
     *       writeMyData(fd);
     *     } finally {
     *       close(fd, (err) => {
     *         if (err) throw err;
     *       });
     *     }
     *   });
     * });
     * ```
     *
     * **write (RECOMMENDED)**
     *
     * ```js
     * import { open, close } from 'fs';
     *
     * open('myfile', 'wx', (err, fd) => {
     *   if (err) {
     *     if (err.code === 'EEXIST') {
     *       console.error('myfile already exists');
     *       return;
     *     }
     *
     *     throw err;
     *   }
     *
     *   try {
     *     writeMyData(fd);
     *   } finally {
     *     close(fd, (err) => {
     *       if (err) throw err;
     *     });
     *   }
     * });
     * ```
     *
     * **read (NOT RECOMMENDED)**
     *
     * ```js
     * import { access, open, close } from 'fs';
     * access('myfile', (err) => {
     *   if (err) {
     *     if (err.code === 'ENOENT') {
     *       console.error('myfile does not exist');
     *       return;
     *     }
     *
     *     throw err;
     *   }
     *
     *   open('myfile', 'r', (err, fd) => {
     *     if (err) throw err;
     *
     *     try {
     *       readMyData(fd);
     *     } finally {
     *       close(fd, (err) => {
     *         if (err) throw err;
     *       });
     *     }
     *   });
     * });
     * ```
     *
     * **read (RECOMMENDED)**
     *
     * ```js
     * import { open, close } from 'fs';
     *
     * open('myfile', 'r', (err, fd) => {
     *   if (err) {
     *     if (err.code === 'ENOENT') {
     *       console.error('myfile does not exist');
     *       return;
     *     }
     *
     *     throw err;
     *   }
     *
     *   try {
     *     readMyData(fd);
     *   } finally {
     *     close(fd, (err) => {
     *       if (err) throw err;
     *     });
     *   }
     * });
     * ```
     *
     * The "not recommended" examples above check for accessibility and then use the
     * file; the "recommended" examples are better because they use the file directly
     * and handle the error, if any.
     *
     * In general, check for the accessibility of a file only if the file will not be
     * used directly, for example when its accessibility is a signal from another
     * process.
     *
     * On Windows, access-control policies (ACLs) on a directory may limit access to
     * a file or directory. The `fs.access()` function, however, does not check the
     * ACL and therefore may report that a path is accessible even if the ACL restricts
     * the user from reading or writing to it.
     * @since v0.11.15
     * @param [mode=fs.constants.F_OK]
     */
    export function access(path: PathLike, mode: number | undefined, callback: NoParamCallback): void;
    /**
     * Asynchronously tests a user's permissions for the file specified by path.
     * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
     */
    export function access(path: PathLike, callback: NoParamCallback): void;
    export namespace access {
        /**
         * Asynchronously tests a user's permissions for the file specified by path.
         * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         */
        function __promisify__(path: PathLike, mode?: number): Promise<void>;
    }
    /**
     * Synchronously tests a user's permissions for the file or directory specified
     * by `path`. The `mode` argument is an optional integer that specifies the
     * accessibility checks to be performed. `mode` should be either the value`fs.constants.F_OK` or a mask consisting of the bitwise OR of any of`fs.constants.R_OK`, `fs.constants.W_OK`, and
     * `fs.constants.X_OK` (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
     * possible values of `mode`.
     *
     * If any of the accessibility checks fail, an `Error` will be thrown. Otherwise,
     * the method will return `undefined`.
     *
     * ```js
     * import { accessSync, constants } from 'fs';
     *
     * try {
     *   accessSync('etc/passwd', constants.R_OK | constants.W_OK);
     *   console.log('can read/write');
     * } catch (err) {
     *   console.error('no access!');
     * }
     * ```
     * @since v0.11.15
     * @param [mode=fs.constants.F_OK]
     */
    export function accessSync(path: PathLike, mode?: number): void;
    interface StreamOptions {
        flags?: string | undefined;
        encoding?: BufferEncoding | undefined;
        fd?: number | promises.FileHandle | undefined;
        mode?: number | undefined;
        autoClose?: boolean | undefined;
        emitClose?: boolean | undefined;
        start?: number | undefined;
    }
    interface FSImplementation {
        open?: (...args: any[]) => any;
        close?: (...args: any[]) => any;
    }
    interface CreateReadStreamFSImplementation extends FSImplementation {
        read: (...args: any[]) => any;
    }
    interface CreateWriteStreamFSImplementation extends FSImplementation {
        write: (...args: any[]) => any;
        writev?: (...args: any[]) => any;
    }
    interface ReadStreamOptions extends StreamOptions {
        fs?: CreateReadStreamFSImplementation | null | undefined;
        end?: number | undefined;
        highWaterMark?: number | undefined;
    }
    interface WriteStreamOptions extends StreamOptions {
        fs?: CreateWriteStreamFSImplementation | null | undefined;
    }
    /**
     * Unlike the 16 kb default `highWaterMark` for a `stream.Readable`, the stream
     * returned by this method has a default `highWaterMark` of 64 kb.
     *
     * `options` can include `start` and `end` values to read a range of bytes from
     * the file instead of the entire file. Both `start` and `end` are inclusive and
     * start counting at 0, allowed values are in the
     * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. If `fd` is specified and `start` is
     * omitted or `undefined`, `fs.createReadStream()` reads sequentially from the
     * current file position. The `encoding` can be any one of those accepted by `Buffer`.
     *
     * If `fd` is specified, `ReadStream` will ignore the `path` argument and will use
     * the specified file descriptor. This means that no `'open'` event will be
     * emitted. `fd` should be blocking; non-blocking `fd`s should be passed to `net.Socket`.
     *
     * If `fd` points to a character device that only supports blocking reads
     * (such as keyboard or sound card), read operations do not finish until data is
     * available. This can prevent the process from exiting and the stream from
     * closing naturally.
     *
     * By default, the stream will emit a `'close'` event after it has been
     * destroyed.  Set the `emitClose` option to `false` to change this behavior.
     *
     * By providing the `fs` option, it is possible to override the corresponding `fs`implementations for `open`, `read`, and `close`. When providing the `fs` option,
     * an override for `read` is required. If no `fd` is provided, an override for`open` is also required. If `autoClose` is `true`, an override for `close` is
     * also required.
     *
     * ```js
     * import { createReadStream } from 'fs';
     *
     * // Create a stream from some character device.
     * const stream = createReadStream('/dev/input/event0');
     * setTimeout(() => {
     *   stream.close(); // This may not close the stream.
     *   // Artificially marking end-of-stream, as if the underlying resource had
     *   // indicated end-of-file by itself, allows the stream to close.
     *   // This does not cancel pending read operations, and if there is such an
     *   // operation, the process may still not be able to exit successfully
     *   // until it finishes.
     *   stream.push(null);
     *   stream.read(0);
     * }, 100);
     * ```
     *
     * If `autoClose` is false, then the file descriptor won't be closed, even if
     * there's an error. It is the application's responsibility to close it and make
     * sure there's no file descriptor leak. If `autoClose` is set to true (default
     * behavior), on `'error'` or `'end'` the file descriptor will be closed
     * automatically.
     *
     * `mode` sets the file mode (permission and sticky bits), but only if the
     * file was created.
     *
     * An example to read the last 10 bytes of a file which is 100 bytes long:
     *
     * ```js
     * import { createReadStream } from 'fs';
     *
     * createReadStream('sample.txt', { start: 90, end: 99 });
     * ```
     *
     * If `options` is a string, then it specifies the encoding.
     * @since v0.1.31
     */
    export function createReadStream(path: PathLike, options?: BufferEncoding | ReadStreamOptions): ReadStream;
    /**
     * `options` may also include a `start` option to allow writing data at some
     * position past the beginning of the file, allowed values are in the
     * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. Modifying a file rather than
     * replacing it may require the `flags` option to be set to `r+` rather than the
     * default `w`. The `encoding` can be any one of those accepted by `Buffer`.
     *
     * If `autoClose` is set to true (default behavior) on `'error'` or `'finish'`the file descriptor will be closed automatically. If `autoClose` is false,
     * then the file descriptor won't be closed, even if there's an error.
     * It is the application's responsibility to close it and make sure there's no
     * file descriptor leak.
     *
     * By default, the stream will emit a `'close'` event after it has been
     * destroyed.  Set the `emitClose` option to `false` to change this behavior.
     *
     * By providing the `fs` option it is possible to override the corresponding `fs`implementations for `open`, `write`, `writev` and `close`. Overriding `write()`without `writev()` can reduce
     * performance as some optimizations (`_writev()`)
     * will be disabled. When providing the `fs` option, overrides for at least one of`write` and `writev` are required. If no `fd` option is supplied, an override
     * for `open` is also required. If `autoClose` is `true`, an override for `close`is also required.
     *
     * Like `fs.ReadStream`, if `fd` is specified, `fs.WriteStream` will ignore the`path` argument and will use the specified file descriptor. This means that no`'open'` event will be
     * emitted. `fd` should be blocking; non-blocking `fd`s
     * should be passed to `net.Socket`.
     *
     * If `options` is a string, then it specifies the encoding.
     * @since v0.1.31
     */
    export function createWriteStream(path: PathLike, options?: BufferEncoding | WriteStreamOptions): WriteStream;
    /**
     * Forces all currently queued I/O operations associated with the file to the
     * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. No arguments other
     * than a possible
     * exception are given to the completion callback.
     * @since v0.1.96
     */
    export function fdatasync(fd: number, callback: NoParamCallback): void;
    export namespace fdatasync {
        /**
         * Asynchronous fdatasync(2) - synchronize a file's in-core state with storage device.
         * @param fd A file descriptor.
         */
        function __promisify__(fd: number): Promise<void>;
    }
    /**
     * Forces all currently queued I/O operations associated with the file to the
     * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. Returns `undefined`.
     * @since v0.1.96
     */
    export function fdatasyncSync(fd: number): void;
    /**
     * Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it
     * already exists. No arguments other than a possible exception are given to the
     * callback function. Node.js makes no guarantees about the atomicity of the copy
     * operation. If an error occurs after the destination file has been opened for
     * writing, Node.js will attempt to remove the destination.
     *
     * `mode` is an optional integer that specifies the behavior
     * of the copy operation. It is possible to create a mask consisting of the bitwise
     * OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`).
     *
     * * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already
     * exists.
     * * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a
     * copy-on-write reflink. If the platform does not support copy-on-write, then a
     * fallback copy mechanism is used.
     * * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to
     * create a copy-on-write reflink. If the platform does not support
     * copy-on-write, then the operation will fail.
     *
     * ```js
     * import { copyFile, constants } from 'fs';
     *
     * function callback(err) {
     *   if (err) throw err;
     *   console.log('source.txt was copied to destination.txt');
     * }
     *
     * // destination.txt will be created or overwritten by default.
     * copyFile('source.txt', 'destination.txt', callback);
     *
     * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
     * copyFile('source.txt', 'destination.txt', constants.COPYFILE_EXCL, callback);
     * ```
     * @since v8.5.0
     * @param src source filename to copy
     * @param dest destination filename of the copy operation
     * @param [mode=0] modifiers for copy operation.
     */
    export function copyFile(src: PathLike, dest: PathLike, callback: NoParamCallback): void;
    export function copyFile(src: PathLike, dest: PathLike, mode: number, callback: NoParamCallback): void;
    export namespace copyFile {
        function __promisify__(src: PathLike, dst: PathLike, mode?: number): Promise<void>;
    }
    /**
     * Synchronously copies `src` to `dest`. By default, `dest` is overwritten if it
     * already exists. Returns `undefined`. Node.js makes no guarantees about the
     * atomicity of the copy operation. If an error occurs after the destination file
     * has been opened for writing, Node.js will attempt to remove the destination.
     *
     * `mode` is an optional integer that specifies the behavior
     * of the copy operation. It is possible to create a mask consisting of the bitwise
     * OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`).
     *
     * * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already
     * exists.
     * * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a
     * copy-on-write reflink. If the platform does not support copy-on-write, then a
     * fallback copy mechanism is used.
     * * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to
     * create a copy-on-write reflink. If the platform does not support
     * copy-on-write, then the operation will fail.
     *
     * ```js
     * import { copyFileSync, constants } from 'fs';
     *
     * // destination.txt will be created or overwritten by default.
     * copyFileSync('source.txt', 'destination.txt');
     * console.log('source.txt was copied to destination.txt');
     *
     * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
     * copyFileSync('source.txt', 'destination.txt', constants.COPYFILE_EXCL);
     * ```
     * @since v8.5.0
     * @param src source filename to copy
     * @param dest destination filename of the copy operation
     * @param [mode=0] modifiers for copy operation.
     */
    export function copyFileSync(src: PathLike, dest: PathLike, mode?: number): void;
    /**
     * Write an array of `ArrayBufferView`s to the file specified by `fd` using`writev()`.
     *
     * `position` is the offset from the beginning of the file where this data
     * should be written. If `typeof position !== 'number'`, the data will be written
     * at the current position.
     *
     * The callback will be given three arguments: `err`, `bytesWritten`, and`buffers`. `bytesWritten` is how many bytes were written from `buffers`.
     *
     * If this method is `util.promisify()` ed, it returns a promise for an`Object` with `bytesWritten` and `buffers` properties.
     *
     * It is unsafe to use `fs.writev()` multiple times on the same file without
     * waiting for the callback. For this scenario, use {@link createWriteStream}.
     *
     * On Linux, positional writes don't work when the file is opened in append mode.
     * The kernel ignores the position argument and always appends the data to
     * the end of the file.
     * @since v12.9.0
     */
    export function writev(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void): void;
    export function writev(
        fd: number,
        buffers: ReadonlyArray<NodeJS.ArrayBufferView>,
        position: number,
        cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void
    ): void;
    export interface WriteVResult {
        bytesWritten: number;
        buffers: NodeJS.ArrayBufferView[];
    }
    export namespace writev {
        function __promisify__(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): Promise<WriteVResult>;
    }
    /**
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link writev}.
     * @since v12.9.0
     * @return The number of bytes written.
     */
    export function writevSync(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): number;
    /**
     * Read from a file specified by `fd` and write to an array of `ArrayBufferView`s
     * using `readv()`.
     *
     * `position` is the offset from the beginning of the file from where data
     * should be read. If `typeof position !== 'number'`, the data will be read
     * from the current position.
     *
     * The callback will be given three arguments: `err`, `bytesRead`, and`buffers`. `bytesRead` is how many bytes were read from the file.
     *
     * If this method is invoked as its `util.promisify()` ed version, it returns
     * a promise for an `Object` with `bytesRead` and `buffers` properties.
     * @since v13.13.0, v12.17.0
     */
    export function readv(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: NodeJS.ArrayBufferView[]) => void): void;
    export function readv(
        fd: number,
        buffers: ReadonlyArray<NodeJS.ArrayBufferView>,
        position: number,
        cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: NodeJS.ArrayBufferView[]) => void
    ): void;
    export interface ReadVResult {
        bytesRead: number;
        buffers: NodeJS.ArrayBufferView[];
    }
    export namespace readv {
        function __promisify__(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): Promise<ReadVResult>;
    }
    /**
     * For detailed information, see the documentation of the asynchronous version of
     * this API: {@link readv}.
     * @since v13.13.0, v12.17.0
     * @return The number of bytes read.
     */
    export function readvSync(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): number;
    export interface OpenDirOptions {
        encoding?: BufferEncoding | undefined;
        /**
         * Number of directory entries that are buffered
         * internally when reading from the directory. Higher values lead to better
         * performance but higher memory usage.
         * @default 32
         */
        bufferSize?: number | undefined;
    }
    /**
     * Synchronously open a directory. See [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html).
     *
     * Creates an `fs.Dir`, which contains all further functions for reading from
     * and cleaning up the directory.
     *
     * The `encoding` option sets the encoding for the `path` while opening the
     * directory and subsequent read operations.
     * @since v12.12.0
     */
    export function opendirSync(path: PathLike, options?: OpenDirOptions): Dir;
    /**
     * Asynchronously open a directory. See the POSIX [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html) documentation for
     * more details.
     *
     * Creates an `fs.Dir`, which contains all further functions for reading from
     * and cleaning up the directory.
     *
     * The `encoding` option sets the encoding for the `path` while opening the
     * directory and subsequent read operations.
     * @since v12.12.0
     */
    export function opendir(path: PathLike, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void;
    export function opendir(path: PathLike, options: OpenDirOptions, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void;
    export namespace opendir {
        function __promisify__(path: PathLike, options?: OpenDirOptions): Promise<Dir>;
    }
    export interface BigIntStats extends StatsBase<bigint> {
        atimeNs: bigint;
        mtimeNs: bigint;
        ctimeNs: bigint;
        birthtimeNs: bigint;
    }
    export interface BigIntOptions {
        bigint: true;
    }
    export interface StatOptions {
        bigint?: boolean | undefined;
    }
    export interface StatSyncOptions extends StatOptions {
        throwIfNoEntry?: boolean | undefined;
    }
    interface CopyOptionsBase {
        /**
         * Dereference symlinks
         * @default false
         */
        dereference?: boolean;
        /**
         * When `force` is `false`, and the destination
         * exists, throw an error.
         * @default false
         */
        errorOnExist?: boolean;
        /**
         * Overwrite existing file or directory. _The copy
         * operation will ignore errors if you set this to false and the destination
         * exists. Use the `errorOnExist` option to change this behavior.
         * @default true
         */
        force?: boolean;
        /**
         * Modifiers for copy operation. See `mode` flag of {@link copyFileSync()}
         */
        mode?: number;
        /**
         * When `true` timestamps from `src` will
         * be preserved.
         * @default false
         */
        preserveTimestamps?: boolean;
        /**
         * Copy directories recursively.
         * @default false
         */
        recursive?: boolean;
        /**
         * When true, path resolution for symlinks will be skipped
         * @default false
         */
        verbatimSymlinks?: boolean;
    }
    export interface CopyOptions extends CopyOptionsBase {
        /**
         * Function to filter copied files/directories. Return
         * `true` to copy the item, `false` to ignore it.
         */
        filter?(source: string, destination: string): boolean | Promise<boolean>;
    }
    export interface CopySyncOptions extends CopyOptionsBase {
        /**
         * Function to filter copied files/directories. Return
         * `true` to copy the item, `false` to ignore it.
         */
        filter?(source: string, destination: string): boolean;
    }
    /**
     * Asynchronously copies the entire directory structure from `src` to `dest`,
     * including subdirectories and files.
     *
     * When copying a directory to another directory, globs are not supported and
     * behavior is similar to `cp dir1/ dir2/`.
     * @since v16.7.0
     * @experimental
     * @param src source path to copy.
     * @param dest destination path to copy to.
     */
    export function cp(source: string | URL, destination: string | URL, callback: (err: NodeJS.ErrnoException | null) => void): void;
    export function cp(source: string | URL, destination: string | URL, opts: CopyOptions, callback: (err: NodeJS.ErrnoException | null) => void): void;
    /**
     * Synchronously copies the entire directory structure from `src` to `dest`,
     * including subdirectories and files.
     *
     * When copying a directory to another directory, globs are not supported and
     * behavior is similar to `cp dir1/ dir2/`.
     * @since v16.7.0
     * @experimental
     * @param src source path to copy.
     * @param dest destination path to copy to.
     */
    export function cpSync(source: string | URL, destination: string | URL, opts?: CopySyncOptions): void;
}
declare module 'node:fs' {
    export * from 'fs';
}
